./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de41.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de41.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71e52c2f7da6d5380080fb621ed04f7c322fd22e434b0426cf7577ab025ae680 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:40:13,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:40:13,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:40:13,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:40:13,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:40:13,850 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:40:13,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:40:13,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:40:13,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:40:13,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:40:13,857 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:40:13,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:40:13,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:40:13,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:40:13,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:40:13,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:40:13,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:40:13,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:40:13,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:40:13,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:40:13,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:40:13,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:40:13,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:40:13,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:40:13,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:40:13,874 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:40:13,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:40:13,881 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:40:13,881 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:40:13,882 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:40:13,883 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:40:13,883 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:40:13,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:40:13,884 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:40:13,885 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:40:13,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:40:13,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:40:13,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:40:13,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:40:13,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:40:13,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:40:13,889 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 21:40:13,916 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:40:13,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:40:13,916 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:40:13,916 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:40:13,917 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:40:13,917 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:40:13,918 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:40:13,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:40:13,918 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:40:13,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:40:13,919 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 21:40:13,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 21:40:13,919 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 21:40:13,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:40:13,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 21:40:13,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:40:13,920 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 21:40:13,920 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 21:40:13,920 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 21:40:13,920 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:40:13,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 21:40:13,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:40:13,921 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:40:13,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:40:13,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:40:13,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:40:13,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:40:13,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 21:40:13,922 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 21:40:13,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 21:40:13,922 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 21:40:13,922 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 21:40:13,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 21:40:13,923 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:40:13,923 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_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71e52c2f7da6d5380080fb621ed04f7c322fd22e434b0426cf7577ab025ae680 [2021-12-06 21:40:14,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:40:14,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:40:14,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:40:14,123 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:40:14,124 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:40:14,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/loops-crafted-1/in-de41.c [2021-12-06 21:40:14,170 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/data/bf7c3067f/c75373a7a9734c3b87513a49d7a1d0de/FLAG19309ee85 [2021-12-06 21:40:14,547 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:40:14,547 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/sv-benchmarks/c/loops-crafted-1/in-de41.c [2021-12-06 21:40:14,552 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/data/bf7c3067f/c75373a7a9734c3b87513a49d7a1d0de/FLAG19309ee85 [2021-12-06 21:40:14,561 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/data/bf7c3067f/c75373a7a9734c3b87513a49d7a1d0de [2021-12-06 21:40:14,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:40:14,564 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:40:14,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:40:14,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:40:14,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:40:14,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:40:14" (1/1) ... [2021-12-06 21:40:14,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41506473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:14, skipping insertion in model container [2021-12-06 21:40:14,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:40:14" (1/1) ... [2021-12-06 21:40:14,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:40:14,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:40:14,673 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/sv-benchmarks/c/loops-crafted-1/in-de41.c[368,381] [2021-12-06 21:40:14,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:40:14,689 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:40:14,698 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/sv-benchmarks/c/loops-crafted-1/in-de41.c[368,381] [2021-12-06 21:40:14,701 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:40:14,710 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:40:14,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:14 WrapperNode [2021-12-06 21:40:14,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:40:14,711 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:40:14,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:40:14,712 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:40:14,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:14" (1/1) ... [2021-12-06 21:40:14,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:14" (1/1) ... [2021-12-06 21:40:14,735 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2021-12-06 21:40:14,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:40:14,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:40:14,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:40:14,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:40:14,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:14" (1/1) ... [2021-12-06 21:40:14,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:14" (1/1) ... [2021-12-06 21:40:14,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:14" (1/1) ... [2021-12-06 21:40:14,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:14" (1/1) ... [2021-12-06 21:40:14,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:14" (1/1) ... [2021-12-06 21:40:14,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:14" (1/1) ... [2021-12-06 21:40:14,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:14" (1/1) ... [2021-12-06 21:40:14,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:40:14,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:40:14,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:40:14,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:40:14,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:14" (1/1) ... [2021-12-06 21:40:14,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:40:14,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:14,776 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:40:14,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:40:14,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:40:14,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:40:14,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:40:14,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 21:40:14,863 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:40:14,864 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:40:14,940 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:40:14,944 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:40:14,944 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-06 21:40:14,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:40:14 BoogieIcfgContainer [2021-12-06 21:40:14,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:40:14,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:40:14,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:40:14,949 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:40:14,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:40:14" (1/3) ... [2021-12-06 21:40:14,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630d20a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:40:14, skipping insertion in model container [2021-12-06 21:40:14,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:14" (2/3) ... [2021-12-06 21:40:14,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630d20a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:40:14, skipping insertion in model container [2021-12-06 21:40:14,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:40:14" (3/3) ... [2021-12-06 21:40:14,952 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de41.c [2021-12-06 21:40:14,956 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:40:14,956 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 21:40:14,991 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:40:14,996 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 21:40:14,997 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 21:40:15,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:15,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 21:40:15,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:15,014 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:15,014 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:15,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:15,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1522018600, now seen corresponding path program 1 times [2021-12-06 21:40:15,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:15,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098024134] [2021-12-06 21:40:15,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:15,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:15,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:15,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098024134] [2021-12-06 21:40:15,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098024134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:40:15,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:40:15,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:40:15,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210055652] [2021-12-06 21:40:15,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:40:15,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 21:40:15,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:15,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 21:40:15,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 21:40:15,178 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:15,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:15,190 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2021-12-06 21:40:15,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 21:40:15,192 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 21:40:15,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:15,198 INFO L225 Difference]: With dead ends: 27 [2021-12-06 21:40:15,198 INFO L226 Difference]: Without dead ends: 11 [2021-12-06 21:40:15,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 21:40:15,203 INFO L933 BasicCegarLoop]: 18 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, 18 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:15,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:40:15,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-12-06 21:40:15,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-12-06 21:40:15,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:15,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2021-12-06 21:40:15,228 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 10 [2021-12-06 21:40:15,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:15,228 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-12-06 21:40:15,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:15,229 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2021-12-06 21:40:15,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 21:40:15,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:15,229 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:15,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 21:40:15,230 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:15,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:15,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1522137764, now seen corresponding path program 1 times [2021-12-06 21:40:15,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:15,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226828528] [2021-12-06 21:40:15,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:15,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:15,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:15,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:15,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226828528] [2021-12-06 21:40:15,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226828528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:40:15,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:40:15,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:40:15,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488597872] [2021-12-06 21:40:15,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:40:15,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:40:15,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:15,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:40:15,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:40:15,450 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:15,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:15,508 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2021-12-06 21:40:15,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:40:15,508 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 21:40:15,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:15,509 INFO L225 Difference]: With dead ends: 29 [2021-12-06 21:40:15,509 INFO L226 Difference]: Without dead ends: 17 [2021-12-06 21:40:15,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:40:15,511 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:15,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 22 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:40:15,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-06 21:40:15,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-06 21:40:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-12-06 21:40:15,515 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 10 [2021-12-06 21:40:15,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:15,515 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-12-06 21:40:15,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:15,515 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-12-06 21:40:15,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 21:40:15,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:15,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:15,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 21:40:15,516 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:15,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:15,517 INFO L85 PathProgramCache]: Analyzing trace with hash 923648321, now seen corresponding path program 1 times [2021-12-06 21:40:15,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:15,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748397803] [2021-12-06 21:40:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:15,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:15,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:15,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748397803] [2021-12-06 21:40:15,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748397803] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:15,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951294114] [2021-12-06 21:40:15,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:15,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:15,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:15,571 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:15,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 21:40:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:15,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 21:40:15,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:15,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:15,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:15,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951294114] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:15,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:15,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-06 21:40:15,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737395600] [2021-12-06 21:40:15,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:15,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 21:40:15,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:15,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 21:40:15,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:40:15,713 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:15,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:15,820 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2021-12-06 21:40:15,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 21:40:15,821 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 21:40:15,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:15,823 INFO L225 Difference]: With dead ends: 65 [2021-12-06 21:40:15,823 INFO L226 Difference]: Without dead ends: 59 [2021-12-06 21:40:15,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-06 21:40:15,824 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:15,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 62 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:40:15,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-06 21:40:15,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 29. [2021-12-06 21:40:15,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:15,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-12-06 21:40:15,831 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 11 [2021-12-06 21:40:15,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:15,831 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-12-06 21:40:15,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:15,831 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-12-06 21:40:15,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 21:40:15,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:15,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:15,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 21:40:16,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-06 21:40:16,034 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:16,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:16,036 INFO L85 PathProgramCache]: Analyzing trace with hash -491381764, now seen corresponding path program 1 times [2021-12-06 21:40:16,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:16,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154492185] [2021-12-06 21:40:16,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:16,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:40:16,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:16,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154492185] [2021-12-06 21:40:16,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154492185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:40:16,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:40:16,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:40:16,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041491524] [2021-12-06 21:40:16,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:40:16,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:40:16,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:16,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:40:16,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:40:16,158 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:16,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:16,214 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2021-12-06 21:40:16,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:40:16,214 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 21:40:16,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:16,215 INFO L225 Difference]: With dead ends: 34 [2021-12-06 21:40:16,215 INFO L226 Difference]: Without dead ends: 24 [2021-12-06 21:40:16,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:40:16,217 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:16,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:40:16,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-06 21:40:16,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-06 21:40:16,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:16,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2021-12-06 21:40:16,223 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 12 [2021-12-06 21:40:16,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:16,223 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2021-12-06 21:40:16,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:16,224 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2021-12-06 21:40:16,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 21:40:16,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:16,224 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:16,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 21:40:16,225 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:16,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:16,225 INFO L85 PathProgramCache]: Analyzing trace with hash 607187538, now seen corresponding path program 1 times [2021-12-06 21:40:16,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:16,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896879529] [2021-12-06 21:40:16,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:16,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:40:16,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:16,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896879529] [2021-12-06 21:40:16,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896879529] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:16,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661417179] [2021-12-06 21:40:16,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:16,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:16,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:16,274 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:16,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 21:40:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:16,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 21:40:16,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:40:16,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:40:16,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661417179] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:16,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:16,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2021-12-06 21:40:16,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470389004] [2021-12-06 21:40:16,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:16,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:40:16,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:16,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:40:16,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:40:16,391 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:16,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:16,414 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2021-12-06 21:40:16,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:40:16,415 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 21:40:16,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:16,415 INFO L225 Difference]: With dead ends: 39 [2021-12-06 21:40:16,415 INFO L226 Difference]: Without dead ends: 35 [2021-12-06 21:40:16,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:40:16,416 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:16,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:40:16,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-06 21:40:16,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-12-06 21:40:16,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:16,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-12-06 21:40:16,422 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 13 [2021-12-06 21:40:16,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:16,423 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-12-06 21:40:16,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:16,423 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-12-06 21:40:16,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 21:40:16,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:16,424 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:16,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-06 21:40:16,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:16,625 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:16,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:16,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1644609900, now seen corresponding path program 1 times [2021-12-06 21:40:16,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:16,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143913071] [2021-12-06 21:40:16,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:16,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:40:16,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:16,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143913071] [2021-12-06 21:40:16,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143913071] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:16,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262035522] [2021-12-06 21:40:16,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:16,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:16,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:16,952 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:16,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 21:40:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:16,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 21:40:16,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:17,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:17,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262035522] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:17,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:17,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-12-06 21:40:17,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058345099] [2021-12-06 21:40:17,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:17,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 21:40:17,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:17,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 21:40:17,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-12-06 21:40:17,457 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:18,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:18,191 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2021-12-06 21:40:18,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 21:40:18,191 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 21:40:18,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:18,192 INFO L225 Difference]: With dead ends: 77 [2021-12-06 21:40:18,192 INFO L226 Difference]: Without dead ends: 71 [2021-12-06 21:40:18,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-12-06 21:40:18,193 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 109 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:18,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 64 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:40:18,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-06 21:40:18,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 37. [2021-12-06 21:40:18,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:18,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 53 transitions. [2021-12-06 21:40:18,199 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 53 transitions. Word has length 14 [2021-12-06 21:40:18,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:18,199 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 53 transitions. [2021-12-06 21:40:18,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:18,199 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 53 transitions. [2021-12-06 21:40:18,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 21:40:18,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:18,200 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:18,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 21:40:18,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:18,402 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:18,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:18,403 INFO L85 PathProgramCache]: Analyzing trace with hash -2067097458, now seen corresponding path program 2 times [2021-12-06 21:40:18,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:18,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434964532] [2021-12-06 21:40:18,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:18,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:40:18,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:18,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434964532] [2021-12-06 21:40:18,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434964532] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:18,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470539761] [2021-12-06 21:40:18,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:40:18,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:18,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:18,479 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:18,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 21:40:18,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:40:18,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:40:18,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 21:40:18,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:40:18,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:40:18,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470539761] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:18,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:18,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-12-06 21:40:18,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848899121] [2021-12-06 21:40:18,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:18,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 21:40:18,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:18,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 21:40:18,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-12-06 21:40:18,609 INFO L87 Difference]: Start difference. First operand 37 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:18,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:18,705 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2021-12-06 21:40:18,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 21:40:18,705 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 21:40:18,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:18,706 INFO L225 Difference]: With dead ends: 74 [2021-12-06 21:40:18,706 INFO L226 Difference]: Without dead ends: 63 [2021-12-06 21:40:18,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:40:18,707 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:18,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 63 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:40:18,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-06 21:40:18,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 34. [2021-12-06 21:40:18,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:18,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2021-12-06 21:40:18,713 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 14 [2021-12-06 21:40:18,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:18,713 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2021-12-06 21:40:18,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:18,713 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2021-12-06 21:40:18,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 21:40:18,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:18,714 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:18,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 21:40:18,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 21:40:18,915 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:18,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:18,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1219996004, now seen corresponding path program 2 times [2021-12-06 21:40:18,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:18,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190644624] [2021-12-06 21:40:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:18,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:18,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:18,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190644624] [2021-12-06 21:40:18,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190644624] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:18,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581980116] [2021-12-06 21:40:18,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:40:18,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:18,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:18,976 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:18,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 21:40:19,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:40:19,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:40:19,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 21:40:19,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:19,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:19,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581980116] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:19,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:19,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-12-06 21:40:19,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051095106] [2021-12-06 21:40:19,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:19,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 21:40:19,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:19,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 21:40:19,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-12-06 21:40:19,122 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:19,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:19,722 INFO L93 Difference]: Finished difference Result 166 states and 229 transitions. [2021-12-06 21:40:19,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 21:40:19,723 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 21:40:19,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:19,724 INFO L225 Difference]: With dead ends: 166 [2021-12-06 21:40:19,724 INFO L226 Difference]: Without dead ends: 156 [2021-12-06 21:40:19,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2021-12-06 21:40:19,726 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 284 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:19,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 176 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:40:19,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-06 21:40:19,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 60. [2021-12-06 21:40:19,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 59 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:19,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 83 transitions. [2021-12-06 21:40:19,739 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 83 transitions. Word has length 14 [2021-12-06 21:40:19,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:19,740 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 83 transitions. [2021-12-06 21:40:19,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:19,740 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 83 transitions. [2021-12-06 21:40:19,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 21:40:19,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:19,741 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:19,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 21:40:19,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:19,942 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:19,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:19,943 INFO L85 PathProgramCache]: Analyzing trace with hash -555035246, now seen corresponding path program 2 times [2021-12-06 21:40:19,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:19,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233049421] [2021-12-06 21:40:19,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:19,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:40:20,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:20,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233049421] [2021-12-06 21:40:20,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233049421] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:20,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053219120] [2021-12-06 21:40:20,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:40:20,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:20,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:20,073 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:20,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 21:40:20,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:40:20,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:40:20,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 21:40:20,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:40:20,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:40:20,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053219120] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:20,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:20,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2021-12-06 21:40:20,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096021885] [2021-12-06 21:40:20,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:20,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:40:20,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:20,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:40:20,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:40:20,167 INFO L87 Difference]: Start difference. First operand 60 states and 83 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:20,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:20,185 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2021-12-06 21:40:20,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:40:20,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-06 21:40:20,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:20,186 INFO L225 Difference]: With dead ends: 70 [2021-12-06 21:40:20,186 INFO L226 Difference]: Without dead ends: 58 [2021-12-06 21:40:20,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:40:20,187 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:20,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:40:20,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-06 21:40:20,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-12-06 21:40:20,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 57 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:20,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 82 transitions. [2021-12-06 21:40:20,198 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 82 transitions. Word has length 15 [2021-12-06 21:40:20,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:20,198 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 82 transitions. [2021-12-06 21:40:20,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:20,199 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 82 transitions. [2021-12-06 21:40:20,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 21:40:20,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:20,200 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:20,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 21:40:20,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:20,404 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:20,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:20,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1176713020, now seen corresponding path program 3 times [2021-12-06 21:40:20,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:20,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307931062] [2021-12-06 21:40:20,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:20,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 21:40:20,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:20,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307931062] [2021-12-06 21:40:20,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307931062] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:20,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952143983] [2021-12-06 21:40:20,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:40:20,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:20,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:20,578 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:20,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 21:40:20,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 21:40:20,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:40:20,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 21:40:20,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 21:40:20,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 21:40:20,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952143983] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:20,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:20,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2021-12-06 21:40:20,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345754789] [2021-12-06 21:40:20,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:20,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 21:40:20,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:20,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 21:40:20,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-06 21:40:20,692 INFO L87 Difference]: Start difference. First operand 58 states and 82 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:20,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:20,806 INFO L93 Difference]: Finished difference Result 109 states and 137 transitions. [2021-12-06 21:40:20,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 21:40:20,806 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 21:40:20,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:20,807 INFO L225 Difference]: With dead ends: 109 [2021-12-06 21:40:20,807 INFO L226 Difference]: Without dead ends: 93 [2021-12-06 21:40:20,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:40:20,808 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:20,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 90 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:40:20,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-06 21:40:20,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2021-12-06 21:40:20,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2021-12-06 21:40:20,815 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 16 [2021-12-06 21:40:20,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:20,815 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2021-12-06 21:40:20,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:20,815 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2021-12-06 21:40:20,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 21:40:20,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:20,816 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:20,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 21:40:21,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:21,017 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:21,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:21,017 INFO L85 PathProgramCache]: Analyzing trace with hash 720326044, now seen corresponding path program 3 times [2021-12-06 21:40:21,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:21,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004367990] [2021-12-06 21:40:21,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:21,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:40:21,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:21,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004367990] [2021-12-06 21:40:21,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004367990] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:21,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923805200] [2021-12-06 21:40:21,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:40:21,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:21,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:21,058 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:21,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 21:40:21,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 21:40:21,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:40:21,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 21:40:21,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:40:21,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:40:21,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923805200] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:21,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:21,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2021-12-06 21:40:21,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954102497] [2021-12-06 21:40:21,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:21,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 21:40:21,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:21,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 21:40:21,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:40:21,146 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:21,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:21,193 INFO L93 Difference]: Finished difference Result 77 states and 108 transitions. [2021-12-06 21:40:21,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:40:21,193 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 21:40:21,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:21,194 INFO L225 Difference]: With dead ends: 77 [2021-12-06 21:40:21,194 INFO L226 Difference]: Without dead ends: 73 [2021-12-06 21:40:21,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:40:21,194 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:21,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 52 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:40:21,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-06 21:40:21,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-12-06 21:40:21,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 70 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:21,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 99 transitions. [2021-12-06 21:40:21,202 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 99 transitions. Word has length 16 [2021-12-06 21:40:21,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:21,202 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 99 transitions. [2021-12-06 21:40:21,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 99 transitions. [2021-12-06 21:40:21,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 21:40:21,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:21,203 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:21,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 21:40:21,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:21,404 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:21,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:21,404 INFO L85 PathProgramCache]: Analyzing trace with hash 796886620, now seen corresponding path program 4 times [2021-12-06 21:40:21,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:21,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835266738] [2021-12-06 21:40:21,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:21,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:21,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:40:21,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:21,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835266738] [2021-12-06 21:40:21,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835266738] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:21,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630723502] [2021-12-06 21:40:21,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 21:40:21,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:21,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:21,607 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:21,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 21:40:21,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 21:40:21,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:40:21,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 21:40:21,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:21,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:40:22,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630723502] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:22,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:22,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 11] total 29 [2021-12-06 21:40:22,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846379211] [2021-12-06 21:40:22,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:22,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 21:40:22,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:22,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 21:40:22,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-12-06 21:40:22,167 INFO L87 Difference]: Start difference. First operand 71 states and 99 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:23,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:23,520 INFO L93 Difference]: Finished difference Result 152 states and 189 transitions. [2021-12-06 21:40:23,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 21:40:23,520 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 21:40:23,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:23,521 INFO L225 Difference]: With dead ends: 152 [2021-12-06 21:40:23,521 INFO L226 Difference]: Without dead ends: 131 [2021-12-06 21:40:23,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=457, Invalid=1993, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 21:40:23,523 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 118 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:23,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 136 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 21:40:23,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-06 21:40:23,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2021-12-06 21:40:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.3908045977011494) internal successors, (121), 87 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:23,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2021-12-06 21:40:23,531 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 18 [2021-12-06 21:40:23,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:23,531 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2021-12-06 21:40:23,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:23,531 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2021-12-06 21:40:23,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 21:40:23,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:23,532 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:23,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 21:40:23,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:23,734 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:23,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:23,735 INFO L85 PathProgramCache]: Analyzing trace with hash -922594724, now seen corresponding path program 4 times [2021-12-06 21:40:23,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:23,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709695390] [2021-12-06 21:40:23,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:23,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:23,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 21:40:23,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:23,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709695390] [2021-12-06 21:40:23,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709695390] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:23,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758649075] [2021-12-06 21:40:23,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 21:40:23,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:23,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:23,809 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:23,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 21:40:23,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 21:40:23,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:40:23,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 21:40:23,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 21:40:23,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 21:40:23,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758649075] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:23,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:23,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-12-06 21:40:23,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619291193] [2021-12-06 21:40:23,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:23,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 21:40:23,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:23,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 21:40:23,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:40:23,956 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:24,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:24,080 INFO L93 Difference]: Finished difference Result 115 states and 150 transitions. [2021-12-06 21:40:24,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 21:40:24,080 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 21:40:24,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:24,081 INFO L225 Difference]: With dead ends: 115 [2021-12-06 21:40:24,081 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 21:40:24,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-12-06 21:40:24,082 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 89 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:24,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 74 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:40:24,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 21:40:24,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2021-12-06 21:40:24,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.380281690140845) internal successors, (98), 71 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:24,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 98 transitions. [2021-12-06 21:40:24,088 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 98 transitions. Word has length 18 [2021-12-06 21:40:24,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:24,088 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 98 transitions. [2021-12-06 21:40:24,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:24,088 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 98 transitions. [2021-12-06 21:40:24,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 21:40:24,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:24,089 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:24,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 21:40:24,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 21:40:24,291 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:24,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:24,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1610400402, now seen corresponding path program 5 times [2021-12-06 21:40:24,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:24,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619637638] [2021-12-06 21:40:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:24,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 21:40:24,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:24,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619637638] [2021-12-06 21:40:24,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619637638] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:24,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649765331] [2021-12-06 21:40:24,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 21:40:24,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:24,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:24,422 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:24,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 21:40:24,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-06 21:40:24,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:40:24,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 21:40:24,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 21:40:24,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:24,543 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 21:40:24,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649765331] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:24,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:24,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2021-12-06 21:40:24,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974877918] [2021-12-06 21:40:24,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:24,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 21:40:24,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:24,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 21:40:24,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:40:24,545 INFO L87 Difference]: Start difference. First operand 72 states and 98 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:24,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:24,596 INFO L93 Difference]: Finished difference Result 96 states and 133 transitions. [2021-12-06 21:40:24,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 21:40:24,597 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 21:40:24,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:24,598 INFO L225 Difference]: With dead ends: 96 [2021-12-06 21:40:24,598 INFO L226 Difference]: Without dead ends: 92 [2021-12-06 21:40:24,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:40:24,599 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 22 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:24,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 76 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:40:24,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-06 21:40:24,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2021-12-06 21:40:24,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.3837209302325582) internal successors, (119), 86 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:24,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 119 transitions. [2021-12-06 21:40:24,608 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 119 transitions. Word has length 19 [2021-12-06 21:40:24,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:24,608 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 119 transitions. [2021-12-06 21:40:24,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:24,609 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 119 transitions. [2021-12-06 21:40:24,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 21:40:24,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:24,609 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:24,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 21:40:24,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:24,810 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:24,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:24,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1793951343, now seen corresponding path program 5 times [2021-12-06 21:40:24,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:24,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722622627] [2021-12-06 21:40:24,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:24,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:40:24,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:24,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722622627] [2021-12-06 21:40:24,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722622627] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:24,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744450886] [2021-12-06 21:40:24,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 21:40:24,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:24,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:24,918 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:24,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 21:40:24,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 21:40:24,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:40:24,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 21:40:24,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:40:24,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:40:25,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744450886] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:25,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:25,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2021-12-06 21:40:25,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104832904] [2021-12-06 21:40:25,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:25,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 21:40:25,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:25,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 21:40:25,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-12-06 21:40:25,109 INFO L87 Difference]: Start difference. First operand 87 states and 119 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:30,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:30,175 INFO L93 Difference]: Finished difference Result 362 states and 466 transitions. [2021-12-06 21:40:30,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-06 21:40:30,175 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 21:40:30,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:30,176 INFO L225 Difference]: With dead ends: 362 [2021-12-06 21:40:30,177 INFO L226 Difference]: Without dead ends: 337 [2021-12-06 21:40:30,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1448, Invalid=3954, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 21:40:30,179 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 514 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:30,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 423 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 21:40:30,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-12-06 21:40:30,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 104. [2021-12-06 21:40:30,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.3786407766990292) internal successors, (142), 103 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:30,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 142 transitions. [2021-12-06 21:40:30,188 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 142 transitions. Word has length 19 [2021-12-06 21:40:30,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:30,188 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 142 transitions. [2021-12-06 21:40:30,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:30,188 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 142 transitions. [2021-12-06 21:40:30,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 21:40:30,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:30,189 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:30,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 21:40:30,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 21:40:30,390 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:30,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:30,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1979130930, now seen corresponding path program 6 times [2021-12-06 21:40:30,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:30,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000685242] [2021-12-06 21:40:30,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:30,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:40:30,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:30,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000685242] [2021-12-06 21:40:30,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000685242] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:30,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810737072] [2021-12-06 21:40:30,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 21:40:30,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:30,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:30,475 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:30,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 21:40:30,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-06 21:40:30,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:40:30,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 21:40:30,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:40:30,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:40:30,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810737072] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:30,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:30,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2021-12-06 21:40:30,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951247086] [2021-12-06 21:40:30,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:30,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 21:40:30,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:30,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 21:40:30,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-12-06 21:40:30,647 INFO L87 Difference]: Start difference. First operand 104 states and 142 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:30,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:30,912 INFO L93 Difference]: Finished difference Result 185 states and 226 transitions. [2021-12-06 21:40:30,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 21:40:30,913 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 21:40:30,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:30,914 INFO L225 Difference]: With dead ends: 185 [2021-12-06 21:40:30,914 INFO L226 Difference]: Without dead ends: 166 [2021-12-06 21:40:30,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-12-06 21:40:30,915 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:30,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 212 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:40:30,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-06 21:40:30,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 100. [2021-12-06 21:40:30,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.3535353535353536) internal successors, (134), 99 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 134 transitions. [2021-12-06 21:40:30,923 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 134 transitions. Word has length 20 [2021-12-06 21:40:30,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:30,923 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 134 transitions. [2021-12-06 21:40:30,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:30,924 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 134 transitions. [2021-12-06 21:40:30,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 21:40:30,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:30,924 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:30,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 21:40:31,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 21:40:31,126 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:31,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:31,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1987539476, now seen corresponding path program 7 times [2021-12-06 21:40:31,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:31,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354166039] [2021-12-06 21:40:31,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:31,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:40:31,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:31,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354166039] [2021-12-06 21:40:31,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354166039] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:31,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494070965] [2021-12-06 21:40:31,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 21:40:31,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:31,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:31,418 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:31,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 21:40:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:31,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 21:40:31,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:35,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:38,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494070965] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:38,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:38,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 18] total 41 [2021-12-06 21:40:38,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487157478] [2021-12-06 21:40:38,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:38,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 21:40:38,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:38,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 21:40:38,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1306, Unknown=1, NotChecked=0, Total=1640 [2021-12-06 21:40:38,105 INFO L87 Difference]: Start difference. First operand 100 states and 134 transitions. Second operand has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:45,709 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 21:40:47,654 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 21:40:50,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:50,237 INFO L93 Difference]: Finished difference Result 198 states and 248 transitions. [2021-12-06 21:40:50,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 21:40:50,237 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-06 21:40:50,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:50,238 INFO L225 Difference]: With dead ends: 198 [2021-12-06 21:40:50,238 INFO L226 Difference]: Without dead ends: 179 [2021-12-06 21:40:50,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=1247, Invalid=4914, Unknown=1, NotChecked=0, Total=6162 [2021-12-06 21:40:50,241 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 260 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:50,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 161 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2021-12-06 21:40:50,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-06 21:40:50,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 124. [2021-12-06 21:40:50,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.3414634146341464) internal successors, (165), 123 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 165 transitions. [2021-12-06 21:40:50,257 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 165 transitions. Word has length 22 [2021-12-06 21:40:50,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:50,257 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 165 transitions. [2021-12-06 21:40:50,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:50,258 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 165 transitions. [2021-12-06 21:40:50,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 21:40:50,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:50,258 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:50,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 21:40:50,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 21:40:50,460 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:50,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:50,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1562904434, now seen corresponding path program 6 times [2021-12-06 21:40:50,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:50,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199330423] [2021-12-06 21:40:50,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:50,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:40:50,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:50,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199330423] [2021-12-06 21:40:50,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199330423] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:50,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576453043] [2021-12-06 21:40:50,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 21:40:50,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:50,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:50,559 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:50,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 21:40:50,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-06 21:40:50,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:40:50,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 21:40:50,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:50,661 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:40:50,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:40:50,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576453043] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:50,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:50,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-12-06 21:40:50,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97095774] [2021-12-06 21:40:50,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:50,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 21:40:50,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:50,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 21:40:50,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-12-06 21:40:50,785 INFO L87 Difference]: Start difference. First operand 124 states and 165 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:51,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:51,099 INFO L93 Difference]: Finished difference Result 165 states and 209 transitions. [2021-12-06 21:40:51,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 21:40:51,099 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-06 21:40:51,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:51,100 INFO L225 Difference]: With dead ends: 165 [2021-12-06 21:40:51,100 INFO L226 Difference]: Without dead ends: 140 [2021-12-06 21:40:51,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2021-12-06 21:40:51,101 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 141 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:51,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 98 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:40:51,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-06 21:40:51,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 103. [2021-12-06 21:40:51,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.3431372549019607) internal successors, (137), 102 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2021-12-06 21:40:51,109 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 22 [2021-12-06 21:40:51,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:51,110 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 137 transitions. [2021-12-06 21:40:51,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:51,110 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 137 transitions. [2021-12-06 21:40:51,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 21:40:51,110 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:51,110 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:51,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 21:40:51,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 21:40:51,312 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:51,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:51,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1894811100, now seen corresponding path program 7 times [2021-12-06 21:40:51,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:51,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919579602] [2021-12-06 21:40:51,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:51,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 21:40:51,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:51,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919579602] [2021-12-06 21:40:51,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919579602] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:51,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009913671] [2021-12-06 21:40:51,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 21:40:51,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:51,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:51,394 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:51,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 21:40:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:51,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 21:40:51,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 21:40:51,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 21:40:51,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009913671] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:51,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:51,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 14 [2021-12-06 21:40:51,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122266483] [2021-12-06 21:40:51,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:51,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 21:40:51,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:51,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 21:40:51,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-06 21:40:51,548 INFO L87 Difference]: Start difference. First operand 103 states and 137 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:51,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:51,636 INFO L93 Difference]: Finished difference Result 134 states and 182 transitions. [2021-12-06 21:40:51,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 21:40:51,637 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-06 21:40:51,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:51,637 INFO L225 Difference]: With dead ends: 134 [2021-12-06 21:40:51,638 INFO L226 Difference]: Without dead ends: 130 [2021-12-06 21:40:51,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-06 21:40:51,638 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:51,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 105 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:40:51,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-06 21:40:51,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2021-12-06 21:40:51,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.3471074380165289) internal successors, (163), 121 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:51,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 163 transitions. [2021-12-06 21:40:51,648 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 163 transitions. Word has length 22 [2021-12-06 21:40:51,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:51,648 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 163 transitions. [2021-12-06 21:40:51,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 163 transitions. [2021-12-06 21:40:51,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 21:40:51,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:51,649 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:51,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-06 21:40:51,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:51,850 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:51,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:51,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1912260034, now seen corresponding path program 8 times [2021-12-06 21:40:51,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:51,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352904377] [2021-12-06 21:40:51,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:51,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 21:40:51,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:51,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352904377] [2021-12-06 21:40:51,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352904377] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:51,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090715649] [2021-12-06 21:40:51,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:40:51,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:51,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:51,927 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:51,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 21:40:51,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:40:51,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:40:51,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 21:40:51,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:52,045 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 21:40:52,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 21:40:52,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090715649] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:52,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:52,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2021-12-06 21:40:52,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406490367] [2021-12-06 21:40:52,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:52,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 21:40:52,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:52,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 21:40:52,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-12-06 21:40:52,232 INFO L87 Difference]: Start difference. First operand 122 states and 163 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:53,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:53,222 INFO L93 Difference]: Finished difference Result 274 states and 331 transitions. [2021-12-06 21:40:53,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 21:40:53,222 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-06 21:40:53,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:53,223 INFO L225 Difference]: With dead ends: 274 [2021-12-06 21:40:53,223 INFO L226 Difference]: Without dead ends: 247 [2021-12-06 21:40:53,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=489, Invalid=1863, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 21:40:53,225 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 284 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:53,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 170 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:40:53,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-12-06 21:40:53,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 139. [2021-12-06 21:40:53,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.3115942028985508) internal successors, (181), 138 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:53,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 181 transitions. [2021-12-06 21:40:53,240 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 181 transitions. Word has length 23 [2021-12-06 21:40:53,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:53,240 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 181 transitions. [2021-12-06 21:40:53,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:53,240 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 181 transitions. [2021-12-06 21:40:53,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 21:40:53,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:53,240 INFO L514 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:53,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-06 21:40:53,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:53,442 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:53,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:53,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1236870529, now seen corresponding path program 3 times [2021-12-06 21:40:53,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:53,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871916408] [2021-12-06 21:40:53,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:53,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:53,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:53,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871916408] [2021-12-06 21:40:53,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871916408] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:53,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128509523] [2021-12-06 21:40:53,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:40:53,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:53,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:53,561 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:53,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 21:40:53,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-06 21:40:53,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:40:53,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 21:40:53,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:53,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:54,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128509523] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:54,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:54,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2021-12-06 21:40:54,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477999863] [2021-12-06 21:40:54,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:54,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 21:40:54,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:54,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 21:40:54,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 21:40:54,013 INFO L87 Difference]: Start difference. First operand 139 states and 181 transitions. Second operand has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:09,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:42:09,091 INFO L93 Difference]: Finished difference Result 847 states and 1132 transitions. [2021-12-06 21:42:09,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-06 21:42:09,092 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-06 21:42:09,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:42:09,095 INFO L225 Difference]: With dead ends: 847 [2021-12-06 21:42:09,095 INFO L226 Difference]: Without dead ends: 807 [2021-12-06 21:42:09,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 72.3s TimeCoverageRelationStatistics Valid=2101, Invalid=4705, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 21:42:09,098 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1623 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 865 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1623 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 2154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 865 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:42:09,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1623 Valid, 1025 Invalid, 2154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [865 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-06 21:42:09,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-12-06 21:42:09,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 201. [2021-12-06 21:42:09,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.365) internal successors, (273), 200 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:09,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 273 transitions. [2021-12-06 21:42:09,119 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 273 transitions. Word has length 23 [2021-12-06 21:42:09,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:42:09,119 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 273 transitions. [2021-12-06 21:42:09,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:09,119 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 273 transitions. [2021-12-06 21:42:09,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 21:42:09,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:42:09,120 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:42:09,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 21:42:09,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 21:42:09,321 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:42:09,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:42:09,322 INFO L85 PathProgramCache]: Analyzing trace with hash -510369070, now seen corresponding path program 9 times [2021-12-06 21:42:09,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:42:09,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843537930] [2021-12-06 21:42:09,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:09,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:42:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 21:42:09,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:42:09,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843537930] [2021-12-06 21:42:09,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843537930] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:42:09,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006725081] [2021-12-06 21:42:09,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:42:09,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:42:09,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:42:09,454 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:42:09,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 21:42:09,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 21:42:09,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:42:09,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 21:42:09,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:42:09,613 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 21:42:09,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:42:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 21:42:09,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006725081] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:42:09,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:42:09,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 23 [2021-12-06 21:42:09,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333163542] [2021-12-06 21:42:09,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:42:09,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 21:42:09,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:42:09,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 21:42:09,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-12-06 21:42:09,676 INFO L87 Difference]: Start difference. First operand 201 states and 273 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:17,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:42:17,353 INFO L93 Difference]: Finished difference Result 462 states and 656 transitions. [2021-12-06 21:42:17,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 21:42:17,354 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 21:42:17,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:42:17,356 INFO L225 Difference]: With dead ends: 462 [2021-12-06 21:42:17,356 INFO L226 Difference]: Without dead ends: 456 [2021-12-06 21:42:17,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=432, Invalid=973, Unknown=1, NotChecked=0, Total=1406 [2021-12-06 21:42:17,357 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 149 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:42:17,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 178 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 21:42:17,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-12-06 21:42:17,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 322. [2021-12-06 21:42:17,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.4766355140186915) internal successors, (474), 321 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:17,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 474 transitions. [2021-12-06 21:42:17,386 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 474 transitions. Word has length 25 [2021-12-06 21:42:17,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:42:17,387 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 474 transitions. [2021-12-06 21:42:17,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:17,387 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 474 transitions. [2021-12-06 21:42:17,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 21:42:17,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:42:17,387 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:42:17,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 21:42:17,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 21:42:17,589 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:42:17,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:42:17,590 INFO L85 PathProgramCache]: Analyzing trace with hash -955275428, now seen corresponding path program 8 times [2021-12-06 21:42:17,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:42:17,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933947682] [2021-12-06 21:42:17,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:17,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:42:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 21:42:17,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:42:17,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933947682] [2021-12-06 21:42:17,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933947682] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:42:17,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244025231] [2021-12-06 21:42:17,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:42:17,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:42:17,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:42:17,985 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:42:17,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 21:42:18,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:42:18,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:42:18,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-06 21:42:18,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:42:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:42:18,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:42:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:42:19,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244025231] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:42:19,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:42:19,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 16] total 45 [2021-12-06 21:42:19,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875133843] [2021-12-06 21:42:19,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:42:19,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 21:42:19,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:42:19,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 21:42:19,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1656, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 21:42:19,489 INFO L87 Difference]: Start difference. First operand 322 states and 474 transitions. Second operand has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 45 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:21,765 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 21:42:25,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:42:25,613 INFO L93 Difference]: Finished difference Result 454 states and 605 transitions. [2021-12-06 21:42:25,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 21:42:25,614 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 45 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-06 21:42:25,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:42:25,616 INFO L225 Difference]: With dead ends: 454 [2021-12-06 21:42:25,616 INFO L226 Difference]: Without dead ends: 434 [2021-12-06 21:42:25,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=757, Invalid=3533, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 21:42:25,618 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 153 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 217 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:42:25,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 97 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 531 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2021-12-06 21:42:25,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-12-06 21:42:25,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 316. [2021-12-06 21:42:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.4825396825396826) internal successors, (467), 315 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 467 transitions. [2021-12-06 21:42:25,647 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 467 transitions. Word has length 26 [2021-12-06 21:42:25,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:42:25,647 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 467 transitions. [2021-12-06 21:42:25,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 45 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:25,648 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 467 transitions. [2021-12-06 21:42:25,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 21:42:25,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:42:25,648 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:42:25,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 21:42:25,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 21:42:25,849 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:42:25,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:42:25,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1118982868, now seen corresponding path program 9 times [2021-12-06 21:42:25,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:42:25,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80143246] [2021-12-06 21:42:25,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:25,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:42:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 21:42:25,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:42:25,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80143246] [2021-12-06 21:42:25,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80143246] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:42:25,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131004249] [2021-12-06 21:42:25,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:42:25,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:42:25,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:42:25,926 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:42:25,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 21:42:25,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 21:42:25,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:42:25,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 21:42:25,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:42:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 21:42:26,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:42:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 21:42:26,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131004249] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:42:26,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:42:26,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 24 [2021-12-06 21:42:26,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637205952] [2021-12-06 21:42:26,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:42:26,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 21:42:26,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:42:26,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 21:42:26,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-12-06 21:42:26,190 INFO L87 Difference]: Start difference. First operand 316 states and 467 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:27,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:42:27,019 INFO L93 Difference]: Finished difference Result 513 states and 664 transitions. [2021-12-06 21:42:27,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 21:42:27,019 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-06 21:42:27,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:42:27,021 INFO L225 Difference]: With dead ends: 513 [2021-12-06 21:42:27,021 INFO L226 Difference]: Without dead ends: 446 [2021-12-06 21:42:27,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 21:42:27,022 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 103 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:42:27,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 445 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:42:27,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-12-06 21:42:27,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 299. [2021-12-06 21:42:27,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.4630872483221478) internal successors, (436), 298 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:27,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 436 transitions. [2021-12-06 21:42:27,051 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 436 transitions. Word has length 26 [2021-12-06 21:42:27,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:42:27,052 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 436 transitions. [2021-12-06 21:42:27,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:27,052 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 436 transitions. [2021-12-06 21:42:27,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 21:42:27,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:42:27,052 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:42:27,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 21:42:27,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 21:42:27,254 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:42:27,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:42:27,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1509115665, now seen corresponding path program 10 times [2021-12-06 21:42:27,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:42:27,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285171601] [2021-12-06 21:42:27,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:27,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:42:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:42:27,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:42:27,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285171601] [2021-12-06 21:42:27,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285171601] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:42:27,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506202482] [2021-12-06 21:42:27,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 21:42:27,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:42:27,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:42:27,422 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:42:27,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 21:42:27,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 21:42:27,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:42:27,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 21:42:27,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:42:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:42:27,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:42:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:42:27,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506202482] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:42:27,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:42:27,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2021-12-06 21:42:27,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396678855] [2021-12-06 21:42:27,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:42:27,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 21:42:27,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:42:27,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 21:42:27,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 21:42:27,844 INFO L87 Difference]: Start difference. First operand 299 states and 436 transitions. Second operand has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:45,913 WARN L227 SmtUtils]: Spent 10.69s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 21:42:57,774 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ 7 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 9 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 5 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 3 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296)) (< 0 (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296)) (< 0 (mod (+ 4294967295 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 6 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296)) (< 0 (mod (+ 2 |c_ULTIMATE.start_main_~y~0#1|) 4294967296))) is different from false [2021-12-06 21:43:15,067 WARN L227 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 21:43:33,048 WARN L227 SmtUtils]: Spent 6.51s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 21:43:42,193 WARN L227 SmtUtils]: Spent 6.81s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 21:44:19,114 WARN L227 SmtUtils]: Spent 6.22s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 21:44:40,337 WARN L227 SmtUtils]: Spent 5.59s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 21:46:31,003 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 21:46:43,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:43,030 INFO L93 Difference]: Finished difference Result 1273 states and 1691 transitions. [2021-12-06 21:46:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-12-06 21:46:43,031 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-06 21:46:43,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:43,035 INFO L225 Difference]: With dead ends: 1273 [2021-12-06 21:46:43,036 INFO L226 Difference]: Without dead ends: 1238 [2021-12-06 21:46:43,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 8502 ImplicationChecksByTransitivity, 241.1s TimeCoverageRelationStatistics Valid=6313, Invalid=16946, Unknown=1, NotChecked=302, Total=23562 [2021-12-06 21:46:43,041 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1609 mSDsluCounter, 1294 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 1011 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1609 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 2713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1011 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:43,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1609 Valid, 1373 Invalid, 2713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1011 Valid, 1701 Invalid, 0 Unknown, 1 Unchecked, 14.3s Time] [2021-12-06 21:46:43,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-12-06 21:46:43,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 322. [2021-12-06 21:46:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.4641744548286604) internal successors, (470), 321 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:46:43,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 470 transitions. [2021-12-06 21:46:43,081 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 470 transitions. Word has length 27 [2021-12-06 21:46:43,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:43,081 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 470 transitions. [2021-12-06 21:46:43,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:46:43,081 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 470 transitions. [2021-12-06 21:46:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:46:43,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:43,082 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:43,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 21:46:43,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 21:46:43,283 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:46:43,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:43,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1507034516, now seen corresponding path program 11 times [2021-12-06 21:46:43,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:43,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780996928] [2021-12-06 21:46:43,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:43,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 21:46:43,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:43,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780996928] [2021-12-06 21:46:43,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780996928] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:46:43,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890461672] [2021-12-06 21:46:43,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 21:46:43,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:43,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:46:43,672 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:46:43,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 21:46:44,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 21:46:44,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:46:44,081 WARN L261 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-06 21:46:44,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:46:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:50,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:46:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:54,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890461672] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:46:54,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:46:54,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 25, 19] total 52 [2021-12-06 21:46:54,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315111076] [2021-12-06 21:46:54,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:46:54,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 21:46:54,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:54,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 21:46:54,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=2232, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 21:46:54,300 INFO L87 Difference]: Start difference. First operand 322 states and 470 transitions. Second operand has 52 states, 52 states have (on average 1.5384615384615385) internal successors, (80), 52 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:46:56,859 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 21:47:46,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:47:46,917 INFO L93 Difference]: Finished difference Result 550 states and 698 transitions. [2021-12-06 21:47:46,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-12-06 21:47:46,917 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5384615384615385) internal successors, (80), 52 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:47:46,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:47:46,919 INFO L225 Difference]: With dead ends: 550 [2021-12-06 21:47:46,919 INFO L226 Difference]: Without dead ends: 532 [2021-12-06 21:47:46,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4010 ImplicationChecksByTransitivity, 54.5s TimeCoverageRelationStatistics Valid=1977, Invalid=11825, Unknown=4, NotChecked=0, Total=13806 [2021-12-06 21:47:46,920 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 235 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:47:46,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 348 Invalid, 1452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2021-12-06 21:47:46,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-12-06 21:47:46,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 340. [2021-12-06 21:47:46,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.4513274336283186) internal successors, (492), 339 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:47:46,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 492 transitions. [2021-12-06 21:47:46,958 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 492 transitions. Word has length 30 [2021-12-06 21:47:46,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:47:46,959 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 492 transitions. [2021-12-06 21:47:46,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5384615384615385) internal successors, (80), 52 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:47:46,959 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 492 transitions. [2021-12-06 21:47:46,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:47:46,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:47:46,959 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:47:46,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 21:47:47,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 21:47:47,160 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:47:47,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:47:47,160 INFO L85 PathProgramCache]: Analyzing trace with hash 52816604, now seen corresponding path program 12 times [2021-12-06 21:47:47,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:47:47,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478595098] [2021-12-06 21:47:47,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:47:47,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:47:47,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:47:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 21:47:47,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:47:47,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478595098] [2021-12-06 21:47:47,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478595098] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:47:47,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329813174] [2021-12-06 21:47:47,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 21:47:47,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:47:47,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:47:47,257 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:47:47,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 21:47:47,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-06 21:47:47,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:47:47,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 21:47:47,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:47:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 21:47:47,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:47:47,570 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 21:47:47,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329813174] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:47:47,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:47:47,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 29 [2021-12-06 21:47:47,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495461984] [2021-12-06 21:47:47,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:47:47,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 21:47:47,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:47:47,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 21:47:47,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-12-06 21:47:47,572 INFO L87 Difference]: Start difference. First operand 340 states and 492 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:47:49,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:47:49,390 INFO L93 Difference]: Finished difference Result 555 states and 708 transitions. [2021-12-06 21:47:49,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 21:47:49,391 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:47:49,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:47:49,393 INFO L225 Difference]: With dead ends: 555 [2021-12-06 21:47:49,393 INFO L226 Difference]: Without dead ends: 474 [2021-12-06 21:47:49,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=327, Invalid=2123, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 21:47:49,394 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 169 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:47:49,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 477 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 21:47:49,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-12-06 21:47:49,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 324. [2021-12-06 21:47:49,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.4272445820433437) internal successors, (461), 323 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:47:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 461 transitions. [2021-12-06 21:47:49,436 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 461 transitions. Word has length 30 [2021-12-06 21:47:49,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:47:49,436 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 461 transitions. [2021-12-06 21:47:49,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:47:49,436 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 461 transitions. [2021-12-06 21:47:49,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 21:47:49,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:47:49,436 INFO L514 BasicCegarLoop]: trace histogram [15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:47:49,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 21:47:49,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:47:49,638 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:47:49,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:47:49,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1397313151, now seen corresponding path program 13 times [2021-12-06 21:47:49,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:47:49,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247599978] [2021-12-06 21:47:49,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:47:49,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:47:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:47:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 21:47:49,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:47:49,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247599978] [2021-12-06 21:47:49,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247599978] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:47:49,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537122658] [2021-12-06 21:47:49,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 21:47:49,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:47:49,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:47:49,836 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:47:49,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc42b0f1-7a4c-42a0-b4c8-2d91d8ab444e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 21:47:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:47:49,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 21:47:49,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:47:49,929 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 21:47:49,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:47:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 21:47:50,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537122658] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:47:50,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:47:50,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2021-12-06 21:47:50,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622011465] [2021-12-06 21:47:50,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:47:50,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 21:47:50,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:47:50,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 21:47:50,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 21:47:50,339 INFO L87 Difference]: Start difference. First operand 324 states and 461 transitions. Second operand has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:48:18,158 WARN L227 SmtUtils]: Spent 12.45s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 21:48:33,376 WARN L227 SmtUtils]: Spent 7.49s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 21:48:35,521 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ 7 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 9 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 5 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 3 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296)) (< 0 (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296)) (< 0 (mod (+ 4294967295 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 6 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 4294967294 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296)) (< 0 (mod (+ 4294967294 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ 2 |c_ULTIMATE.start_main_~y~0#1|) 4294967296))) is different from false [2021-12-06 21:49:06,701 WARN L227 SmtUtils]: Spent 13.37s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 21:49:38,364 WARN L227 SmtUtils]: Spent 11.02s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 21:49:56,333 WARN L227 SmtUtils]: Spent 11.56s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 21:50:14,964 WARN L227 SmtUtils]: Spent 7.95s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 21:50:39,072 WARN L227 SmtUtils]: Spent 10.73s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 21:51:32,611 WARN L227 SmtUtils]: Spent 14.90s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 21:52:11,098 WARN L227 SmtUtils]: Spent 11.08s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 21:52:24,515 WARN L227 SmtUtils]: Spent 7.07s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 21:52:50,213 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ 7 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 9 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 5 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 3 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296)) (< 0 (mod (+ 4294967295 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 6 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296)) (< 0 (mod (+ 4294967294 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ 2 |c_ULTIMATE.start_main_~y~0#1|) 4294967296))) is different from false [2021-12-06 21:53:06,040 WARN L227 SmtUtils]: Spent 10.54s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 21:53:30,897 WARN L227 SmtUtils]: Spent 5.53s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 21:54:09,906 WARN L227 SmtUtils]: Spent 7.65s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 21:54:19,574 WARN L227 SmtUtils]: Spent 5.09s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)