./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.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_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/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_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/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_655b06b6-af41-4229-a9de-5ef643147869/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 fc71ae13b1bed24e074eb2de07c8f2064aa903343708c3aabf1b928078c9e7f6 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:45:11,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:45:11,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:45:11,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:45:11,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:45:11,850 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:45:11,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:45:11,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:45:11,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:45:11,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:45:11,857 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:45:11,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:45:11,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:45:11,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:45:11,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:45:11,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:45:11,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:45:11,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:45:11,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:45:11,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:45:11,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:45:11,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:45:11,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:45:11,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:45:11,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:45:11,874 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:45:11,874 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:45:11,875 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:45:11,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:45:11,876 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:45:11,876 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:45:11,877 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:45:11,877 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:45:11,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:45:11,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:45:11,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:45:11,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:45:11,880 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:45:11,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:45:11,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:45:11,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:45:11,882 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 21:45:11,899 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:45:11,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:45:11,899 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:45:11,899 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:45:11,900 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:45:11,900 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:45:11,900 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:45:11,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:45:11,901 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:45:11,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:45:11,901 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 21:45:11,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 21:45:11,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 21:45:11,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:45:11,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 21:45:11,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:45:11,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 21:45:11,902 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 21:45:11,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 21:45:11,902 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:45:11,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 21:45:11,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:45:11,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:45:11,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:45:11,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:45:11,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:45:11,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:45:11,903 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 21:45:11,903 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 21:45:11,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 21:45:11,903 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 21:45:11,903 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 21:45:11,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 21:45:11,903 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:45:11,903 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_655b06b6-af41-4229-a9de-5ef643147869/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc71ae13b1bed24e074eb2de07c8f2064aa903343708c3aabf1b928078c9e7f6 [2021-12-06 21:45:12,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:45:12,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:45:12,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:45:12,117 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:45:12,118 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:45:12,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c [2021-12-06 21:45:12,167 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/data/01c5432e0/511d31dd493d4f51a75e80b8437ad28d/FLAG7d7cf6bf7 [2021-12-06 21:45:12,539 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:45:12,539 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c [2021-12-06 21:45:12,544 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/data/01c5432e0/511d31dd493d4f51a75e80b8437ad28d/FLAG7d7cf6bf7 [2021-12-06 21:45:12,553 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/data/01c5432e0/511d31dd493d4f51a75e80b8437ad28d [2021-12-06 21:45:12,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:45:12,556 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:45:12,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:45:12,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:45:12,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:45:12,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:45:12" (1/1) ... [2021-12-06 21:45:12,561 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26b54235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:12, skipping insertion in model container [2021-12-06 21:45:12,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:45:12" (1/1) ... [2021-12-06 21:45:12,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:45:12,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:45:12,683 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_655b06b6-af41-4229-a9de-5ef643147869/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c[490,503] [2021-12-06 21:45:12,697 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:45:12,703 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:45:12,712 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_655b06b6-af41-4229-a9de-5ef643147869/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c[490,503] [2021-12-06 21:45:12,720 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:45:12,729 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:45:12,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:12 WrapperNode [2021-12-06 21:45:12,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:45:12,730 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:45:12,731 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:45:12,731 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:45:12,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:12" (1/1) ... [2021-12-06 21:45:12,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:12" (1/1) ... [2021-12-06 21:45:12,755 INFO L137 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2021-12-06 21:45:12,756 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:45:12,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:45:12,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:45:12,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:45:12,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:12" (1/1) ... [2021-12-06 21:45:12,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:12" (1/1) ... [2021-12-06 21:45:12,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:12" (1/1) ... [2021-12-06 21:45:12,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:12" (1/1) ... [2021-12-06 21:45:12,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:12" (1/1) ... [2021-12-06 21:45:12,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:12" (1/1) ... [2021-12-06 21:45:12,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:12" (1/1) ... [2021-12-06 21:45:12,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:45:12,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:45:12,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:45:12,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:45:12,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:12" (1/1) ... [2021-12-06 21:45:12,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:45:12,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:12,803 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:45:12,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:45:12,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:45:12,834 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 21:45:12,834 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 21:45:12,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 21:45:12,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:45:12,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:45:12,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 21:45:12,834 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 21:45:12,880 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:45:12,881 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:45:12,982 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:45:12,996 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:45:12,996 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 21:45:12,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:45:12 BoogieIcfgContainer [2021-12-06 21:45:12,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:45:13,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:45:13,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:45:13,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:45:13,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:45:12" (1/3) ... [2021-12-06 21:45:13,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f56d0fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:45:13, skipping insertion in model container [2021-12-06 21:45:13,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:45:12" (2/3) ... [2021-12-06 21:45:13,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f56d0fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:45:13, skipping insertion in model container [2021-12-06 21:45:13,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:45:12" (3/3) ... [2021-12-06 21:45:13,016 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound50.c [2021-12-06 21:45:13,020 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:45:13,021 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 21:45:13,058 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:45:13,064 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 21:45:13,065 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 21:45:13,082 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 21:45:13,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 21:45:13,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:13,090 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:13,091 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:13,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:13,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2021-12-06 21:45:13,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:13,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184651316] [2021-12-06 21:45:13,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:13,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:13,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:45:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:13,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:45:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:13,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 21:45:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:13,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 21:45:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:13,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 21:45:13,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:13,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 21:45:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 21:45:13,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:13,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184651316] [2021-12-06 21:45:13,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184651316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:45:13,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:45:13,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:45:13,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656194944] [2021-12-06 21:45:13,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:45:13,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 21:45:13,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:13,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 21:45:13,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 21:45:13,291 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 21:45:13,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:13,313 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2021-12-06 21:45:13,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 21:45:13,315 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-12-06 21:45:13,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:13,323 INFO L225 Difference]: With dead ends: 67 [2021-12-06 21:45:13,323 INFO L226 Difference]: Without dead ends: 31 [2021-12-06 21:45:13,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 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 21:45:13,330 INFO L933 BasicCegarLoop]: 46 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, 46 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 21:45:13,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:45:13,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-06 21:45:13,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-06 21:45:13,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 21:45:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-12-06 21:45:13,372 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2021-12-06 21:45:13,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:13,372 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-12-06 21:45:13,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 21:45:13,373 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-12-06 21:45:13,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 21:45:13,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:13,375 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:13,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 21:45:13,375 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:13,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:13,376 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2021-12-06 21:45:13,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:13,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749586789] [2021-12-06 21:45:13,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:13,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:13,401 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:45:13,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511550442] [2021-12-06 21:45:13,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:13,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:13,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:13,403 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:45:13,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 21:45:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:13,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 21:45:13,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:45:13,584 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 21:45:13,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:45:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 21:45:13,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:13,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749586789] [2021-12-06 21:45:13,696 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:45:13,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511550442] [2021-12-06 21:45:13,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511550442] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:45:13,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:45:13,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-12-06 21:45:13,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605818502] [2021-12-06 21:45:13,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:45:13,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:45:13,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:13,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:45:13,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:45:13,700 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 21:45:13,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:13,778 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2021-12-06 21:45:13,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:45:13,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2021-12-06 21:45:13,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:13,780 INFO L225 Difference]: With dead ends: 48 [2021-12-06 21:45:13,780 INFO L226 Difference]: Without dead ends: 40 [2021-12-06 21:45:13,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:45:13,782 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:13,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 134 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:45:13,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-06 21:45:13,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-12-06 21:45:13,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 21:45:13,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-12-06 21:45:13,791 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2021-12-06 21:45:13,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:13,792 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-12-06 21:45:13,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 21:45:13,792 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-12-06 21:45:13,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 21:45:13,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:13,793 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:13,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 21:45:13,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:13,995 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:13,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:13,997 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2021-12-06 21:45:13,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:13,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642891601] [2021-12-06 21:45:13,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:14,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:14,050 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:45:14,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602356895] [2021-12-06 21:45:14,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:14,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:14,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:14,055 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:45:14,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 21:45:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:14,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 21:45:14,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:45:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 21:45:14,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:45:14,339 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 21:45:14,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:14,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642891601] [2021-12-06 21:45:14,340 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:45:14,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602356895] [2021-12-06 21:45:14,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602356895] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 21:45:14,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:45:14,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-12-06 21:45:14,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217411009] [2021-12-06 21:45:14,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:45:14,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:45:14,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:14,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:45:14,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:45:14,343 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 21:45:14,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:14,396 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2021-12-06 21:45:14,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:45:14,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2021-12-06 21:45:14,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:14,397 INFO L225 Difference]: With dead ends: 39 [2021-12-06 21:45:14,397 INFO L226 Difference]: Without dead ends: 37 [2021-12-06 21:45:14,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:45:14,399 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:14,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 130 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:45:14,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-06 21:45:14,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-06 21:45:14,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 21:45:14,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-12-06 21:45:14,408 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2021-12-06 21:45:14,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:14,409 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-12-06 21:45:14,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 21:45:14,409 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-12-06 21:45:14,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 21:45:14,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:14,411 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:14,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 21:45:14,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:14,613 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:14,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:14,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2021-12-06 21:45:14,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:14,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114394490] [2021-12-06 21:45:14,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:14,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:14,646 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:45:14,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276990967] [2021-12-06 21:45:14,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:14,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:14,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:14,649 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:45:14,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 21:45:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:14,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 21:45:14,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:45:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 21:45:14,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:45:14,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:14,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114394490] [2021-12-06 21:45:14,785 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:45:14,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276990967] [2021-12-06 21:45:14,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276990967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:45:14,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:45:14,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:45:14,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198451109] [2021-12-06 21:45:14,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:45:14,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:45:14,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:14,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:45:14,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:45:14,787 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 21:45:14,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:14,813 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-12-06 21:45:14,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:45:14,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2021-12-06 21:45:14,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:14,814 INFO L225 Difference]: With dead ends: 50 [2021-12-06 21:45:14,814 INFO L226 Difference]: Without dead ends: 48 [2021-12-06 21:45:14,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:45:14,815 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:14,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 157 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:45:14,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-06 21:45:14,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-12-06 21:45:14,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 21:45:14,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2021-12-06 21:45:14,823 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2021-12-06 21:45:14,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:14,824 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2021-12-06 21:45:14,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 21:45:14,824 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2021-12-06 21:45:14,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 21:45:14,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:14,825 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:14,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 21:45:15,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:15,027 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:15,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:15,028 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2021-12-06 21:45:15,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:15,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877900559] [2021-12-06 21:45:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:15,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:15,067 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:45:15,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819543340] [2021-12-06 21:45:15,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:15,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:15,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:15,071 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:45:15,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 21:45:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:15,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 21:45:15,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:45:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 21:45:15,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:45:15,399 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-06 21:45:15,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:15,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877900559] [2021-12-06 21:45:15,400 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:45:15,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819543340] [2021-12-06 21:45:15,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819543340] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 21:45:15,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:45:15,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-12-06 21:45:15,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786558808] [2021-12-06 21:45:15,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:45:15,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:45:15,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:15,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:45:15,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:45:15,402 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 21:45:15,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:15,441 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2021-12-06 21:45:15,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:45:15,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-12-06 21:45:15,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:15,443 INFO L225 Difference]: With dead ends: 54 [2021-12-06 21:45:15,443 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 21:45:15,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:45:15,444 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:15,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 147 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:45:15,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 21:45:15,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-12-06 21:45:15,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 21:45:15,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-12-06 21:45:15,461 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2021-12-06 21:45:15,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:15,462 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-12-06 21:45:15,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 21:45:15,462 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-12-06 21:45:15,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 21:45:15,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:15,464 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:15,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 21:45:15,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:15,666 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:15,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:15,667 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2021-12-06 21:45:15,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:15,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957898239] [2021-12-06 21:45:15,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:15,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:15,711 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:45:15,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88875016] [2021-12-06 21:45:15,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:15,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:15,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:15,715 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:45:15,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 21:45:15,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:15,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 21:45:15,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:45:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 21:45:15,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:45:16,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:16,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957898239] [2021-12-06 21:45:16,171 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:45:16,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88875016] [2021-12-06 21:45:16,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88875016] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:45:16,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:45:16,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-06 21:45:16,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768569417] [2021-12-06 21:45:16,172 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 21:45:16,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:45:16,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:16,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:45:16,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:45:16,173 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 21:45:16,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:16,258 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2021-12-06 21:45:16,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:45:16,258 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-12-06 21:45:16,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:16,260 INFO L225 Difference]: With dead ends: 58 [2021-12-06 21:45:16,260 INFO L226 Difference]: Without dead ends: 56 [2021-12-06 21:45:16,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:45:16,261 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 12 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:16,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 134 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:45:16,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-06 21:45:16,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-12-06 21:45:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 21:45:16,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-12-06 21:45:16,271 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2021-12-06 21:45:16,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:16,272 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-12-06 21:45:16,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 21:45:16,272 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-12-06 21:45:16,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 21:45:16,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:16,274 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:16,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 21:45:16,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:16,476 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:16,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:16,478 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2021-12-06 21:45:16,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:16,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709206236] [2021-12-06 21:45:16,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:16,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:16,516 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:45:16,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5522729] [2021-12-06 21:45:16,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:16,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:16,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:16,518 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:45:16,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 21:45:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:16,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 21:45:16,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:45:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-06 21:45:16,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:45:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-06 21:45:16,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:16,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709206236] [2021-12-06 21:45:16,733 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:45:16,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5522729] [2021-12-06 21:45:16,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5522729] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:45:16,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:45:16,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-06 21:45:16,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491429070] [2021-12-06 21:45:16,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:45:16,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 21:45:16,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:16,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 21:45:16,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:45:16,739 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 21:45:16,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:16,846 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2021-12-06 21:45:16,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:45:16,847 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2021-12-06 21:45:16,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:16,848 INFO L225 Difference]: With dead ends: 102 [2021-12-06 21:45:16,848 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 21:45:16,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-06 21:45:16,849 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 32 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:16,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 257 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:45:16,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 21:45:16,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2021-12-06 21:45:16,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-06 21:45:16,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2021-12-06 21:45:16,864 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2021-12-06 21:45:16,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:16,864 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2021-12-06 21:45:16,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 21:45:16,864 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2021-12-06 21:45:16,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 21:45:16,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:16,865 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:16,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-06 21:45:17,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 21:45:17,066 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:17,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:17,067 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2021-12-06 21:45:17,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:17,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113709676] [2021-12-06 21:45:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:17,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:17,077 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:45:17,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606829305] [2021-12-06 21:45:17,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:17,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:17,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:17,078 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:45:17,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 21:45:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:17,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 21:45:17,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:45:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-06 21:45:17,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:45:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-06 21:45:17,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:17,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113709676] [2021-12-06 21:45:17,385 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:45:17,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606829305] [2021-12-06 21:45:17,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606829305] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:45:17,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:45:17,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-12-06 21:45:17,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892244670] [2021-12-06 21:45:17,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:45:17,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 21:45:17,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:17,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 21:45:17,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-06 21:45:17,388 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-12-06 21:45:17,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:17,627 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2021-12-06 21:45:17,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 21:45:17,628 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 71 [2021-12-06 21:45:17,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:17,631 INFO L225 Difference]: With dead ends: 128 [2021-12-06 21:45:17,631 INFO L226 Difference]: Without dead ends: 124 [2021-12-06 21:45:17,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-12-06 21:45:17,632 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 36 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:17,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 312 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:45:17,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-06 21:45:17,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2021-12-06 21:45:17,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.18) internal successors, (59), 52 states have internal predecessors, (59), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-06 21:45:17,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2021-12-06 21:45:17,655 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2021-12-06 21:45:17,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:17,655 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2021-12-06 21:45:17,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-12-06 21:45:17,655 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2021-12-06 21:45:17,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 21:45:17,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:17,657 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:17,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 21:45:17,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:17,859 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:17,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:17,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2021-12-06 21:45:17,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:17,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977150339] [2021-12-06 21:45:17,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:17,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:17,897 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:45:17,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295151543] [2021-12-06 21:45:17,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:45:17,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:17,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:17,900 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:45:17,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 21:45:17,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:45:17,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:45:17,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 21:45:17,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:45:18,167 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 21:45:18,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:45:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 21:45:18,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:18,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977150339] [2021-12-06 21:45:18,272 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:45:18,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295151543] [2021-12-06 21:45:18,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295151543] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:45:18,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:45:18,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-12-06 21:45:18,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692103142] [2021-12-06 21:45:18,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:45:18,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 21:45:18,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:18,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 21:45:18,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:45:18,274 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-06 21:45:19,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:19,124 INFO L93 Difference]: Finished difference Result 116 states and 159 transitions. [2021-12-06 21:45:19,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 21:45:19,124 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 76 [2021-12-06 21:45:19,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:19,126 INFO L225 Difference]: With dead ends: 116 [2021-12-06 21:45:19,126 INFO L226 Difference]: Without dead ends: 114 [2021-12-06 21:45:19,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-12-06 21:45:19,127 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:19,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 221 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 21:45:19,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-06 21:45:19,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 96. [2021-12-06 21:45:19,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 53 states have (on average 1.169811320754717) internal successors, (62), 55 states have internal predecessors, (62), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-06 21:45:19,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 129 transitions. [2021-12-06 21:45:19,142 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 129 transitions. Word has length 76 [2021-12-06 21:45:19,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:19,142 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 129 transitions. [2021-12-06 21:45:19,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-06 21:45:19,142 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 129 transitions. [2021-12-06 21:45:19,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 21:45:19,143 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:19,143 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:19,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 21:45:19,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:19,344 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:19,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:19,345 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2021-12-06 21:45:19,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:19,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667963885] [2021-12-06 21:45:19,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:19,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:19,354 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:45:19,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939554791] [2021-12-06 21:45:19,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:45:19,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:19,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:19,356 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:45:19,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 21:45:19,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 21:45:19,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:45:19,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 21:45:19,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:45:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-06 21:45:19,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:45:19,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:19,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667963885] [2021-12-06 21:45:19,774 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:45:19,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939554791] [2021-12-06 21:45:19,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939554791] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:45:19,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:45:19,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-06 21:45:19,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796075842] [2021-12-06 21:45:19,775 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 21:45:19,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 21:45:19,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:19,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 21:45:19,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-06 21:45:19,776 INFO L87 Difference]: Start difference. First operand 96 states and 129 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-06 21:45:20,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:20,031 INFO L93 Difference]: Finished difference Result 128 states and 168 transitions. [2021-12-06 21:45:20,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 21:45:20,032 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2021-12-06 21:45:20,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:20,033 INFO L225 Difference]: With dead ends: 128 [2021-12-06 21:45:20,033 INFO L226 Difference]: Without dead ends: 126 [2021-12-06 21:45:20,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:45:20,034 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:20,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 226 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:45:20,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-06 21:45:20,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2021-12-06 21:45:20,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 71 states have internal predecessors, (80), 42 states have call successors, (42), 11 states have call predecessors, (42), 11 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2021-12-06 21:45:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 163 transitions. [2021-12-06 21:45:20,049 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 163 transitions. Word has length 81 [2021-12-06 21:45:20,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:20,049 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 163 transitions. [2021-12-06 21:45:20,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-06 21:45:20,049 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 163 transitions. [2021-12-06 21:45:20,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 21:45:20,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:20,050 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:20,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 21:45:20,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 21:45:20,252 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:20,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:20,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2021-12-06 21:45:20,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:20,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741927892] [2021-12-06 21:45:20,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:20,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:20,281 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:45:20,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757397363] [2021-12-06 21:45:20,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:20,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:20,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:20,285 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:45:20,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 21:45:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:20,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 21:45:20,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:45:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-06 21:45:20,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:45:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-06 21:45:21,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:21,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741927892] [2021-12-06 21:45:21,173 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:45:21,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757397363] [2021-12-06 21:45:21,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757397363] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:45:21,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:45:21,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-12-06 21:45:21,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563541481] [2021-12-06 21:45:21,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:45:21,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 21:45:21,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:21,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 21:45:21,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-12-06 21:45:21,174 INFO L87 Difference]: Start difference. First operand 123 states and 163 transitions. Second operand has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-06 21:45:23,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:23,899 INFO L93 Difference]: Finished difference Result 205 states and 282 transitions. [2021-12-06 21:45:23,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 21:45:23,900 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 87 [2021-12-06 21:45:23,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:23,901 INFO L225 Difference]: With dead ends: 205 [2021-12-06 21:45:23,901 INFO L226 Difference]: Without dead ends: 196 [2021-12-06 21:45:23,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 21:45:23,903 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 61 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:23,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 444 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 21:45:23,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-06 21:45:23,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2021-12-06 21:45:23,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 109 states have internal predecessors, (126), 70 states have call successors, (70), 14 states have call predecessors, (70), 14 states have return successors, (69), 68 states have call predecessors, (69), 69 states have call successors, (69) [2021-12-06 21:45:23,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 265 transitions. [2021-12-06 21:45:23,929 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 265 transitions. Word has length 87 [2021-12-06 21:45:23,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:23,929 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 265 transitions. [2021-12-06 21:45:23,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-06 21:45:23,929 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 265 transitions. [2021-12-06 21:45:23,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 21:45:23,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:23,930 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:23,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-06 21:45:24,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:24,133 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:24,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:24,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2021-12-06 21:45:24,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:24,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906632878] [2021-12-06 21:45:24,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:24,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:24,162 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:45:24,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330037466] [2021-12-06 21:45:24,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:24,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:24,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:24,166 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:45:24,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 21:45:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:24,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 21:45:24,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:45:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 59 proven. 35 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-12-06 21:45:24,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:45:28,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:28,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906632878] [2021-12-06 21:45:28,286 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:45:28,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330037466] [2021-12-06 21:45:28,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330037466] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:45:28,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:45:28,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-06 21:45:28,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729274558] [2021-12-06 21:45:28,286 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 21:45:28,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 21:45:28,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:28,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 21:45:28,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=184, Unknown=1, NotChecked=0, Total=240 [2021-12-06 21:45:28,287 INFO L87 Difference]: Start difference. First operand 192 states and 265 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-12-06 21:45:28,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:28,711 INFO L93 Difference]: Finished difference Result 199 states and 271 transitions. [2021-12-06 21:45:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 21:45:28,712 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 103 [2021-12-06 21:45:28,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:28,713 INFO L225 Difference]: With dead ends: 199 [2021-12-06 21:45:28,713 INFO L226 Difference]: Without dead ends: 197 [2021-12-06 21:45:28,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=77, Invalid=264, Unknown=1, NotChecked=0, Total=342 [2021-12-06 21:45:28,714 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 20 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:28,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 302 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:45:28,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-06 21:45:28,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2021-12-06 21:45:28,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 112 states have internal predecessors, (129), 70 states have call successors, (70), 15 states have call predecessors, (70), 15 states have return successors, (69), 68 states have call predecessors, (69), 69 states have call successors, (69) [2021-12-06 21:45:28,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 268 transitions. [2021-12-06 21:45:28,741 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 268 transitions. Word has length 103 [2021-12-06 21:45:28,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:28,742 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 268 transitions. [2021-12-06 21:45:28,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-12-06 21:45:28,742 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 268 transitions. [2021-12-06 21:45:28,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 21:45:28,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:28,743 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:28,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-06 21:45:28,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:28,944 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:28,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:28,944 INFO L85 PathProgramCache]: Analyzing trace with hash -992204181, now seen corresponding path program 4 times [2021-12-06 21:45:28,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:28,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318110949] [2021-12-06 21:45:28,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:28,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:28,951 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:45:28,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1848463772] [2021-12-06 21:45:28,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 21:45:28,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:28,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:28,952 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:45:28,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 21:45:28,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 21:45:28,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:45:28,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 21:45:28,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:45:29,067 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 21:45:29,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:45:29,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:29,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318110949] [2021-12-06 21:45:29,068 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:45:29,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848463772] [2021-12-06 21:45:29,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848463772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:45:29,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:45:29,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:45:29,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291781090] [2021-12-06 21:45:29,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:45:29,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:45:29,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:29,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:45:29,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:45:29,069 INFO L87 Difference]: Start difference. First operand 196 states and 268 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-06 21:45:29,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:29,133 INFO L93 Difference]: Finished difference Result 258 states and 354 transitions. [2021-12-06 21:45:29,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:45:29,134 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 106 [2021-12-06 21:45:29,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:29,136 INFO L225 Difference]: With dead ends: 258 [2021-12-06 21:45:29,136 INFO L226 Difference]: Without dead ends: 184 [2021-12-06 21:45:29,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:45:29,138 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:29,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 167 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:45:29,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-06 21:45:29,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 171. [2021-12-06 21:45:29,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 96 states have (on average 1.125) internal successors, (108), 97 states have internal predecessors, (108), 59 states have call successors, (59), 15 states have call predecessors, (59), 15 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2021-12-06 21:45:29,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 225 transitions. [2021-12-06 21:45:29,162 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 225 transitions. Word has length 106 [2021-12-06 21:45:29,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:29,162 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 225 transitions. [2021-12-06 21:45:29,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-06 21:45:29,163 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 225 transitions. [2021-12-06 21:45:29,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 21:45:29,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:29,164 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:29,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 21:45:29,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:29,365 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:29,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:29,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1098112047, now seen corresponding path program 2 times [2021-12-06 21:45:29,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:29,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122568143] [2021-12-06 21:45:29,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:29,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:29,394 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:45:29,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365972194] [2021-12-06 21:45:29,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:45:29,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:29,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:29,397 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:45:29,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 21:45:29,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:45:29,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:45:29,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 21:45:29,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:45:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 91 proven. 52 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-12-06 21:45:30,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:45:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 91 proven. 52 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-12-06 21:45:46,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:46,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122568143] [2021-12-06 21:45:46,708 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:45:46,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365972194] [2021-12-06 21:45:46,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365972194] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:45:46,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:45:46,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-12-06 21:45:46,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295619818] [2021-12-06 21:45:46,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:45:46,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 21:45:46,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:46,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 21:45:46,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-12-06 21:45:46,709 INFO L87 Difference]: Start difference. First operand 171 states and 225 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 14 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (38), 12 states have call predecessors, (38), 13 states have call successors, (38) [2021-12-06 21:45:52,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 21:45:55,307 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 21:45:57,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 21:45:59,347 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 21:46:01,586 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 21:46:05,890 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 21:46:08,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:08,322 INFO L93 Difference]: Finished difference Result 262 states and 355 transitions. [2021-12-06 21:46:08,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 21:46:08,323 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 14 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (38), 12 states have call predecessors, (38), 13 states have call successors, (38) Word has length 125 [2021-12-06 21:46:08,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:08,325 INFO L225 Difference]: With dead ends: 262 [2021-12-06 21:46:08,325 INFO L226 Difference]: Without dead ends: 260 [2021-12-06 21:46:08,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-12-06 21:46:08,326 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 79 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 150 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:08,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 444 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 632 Invalid, 6 Unknown, 0 Unchecked, 19.5s Time] [2021-12-06 21:46:08,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-06 21:46:08,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 258. [2021-12-06 21:46:08,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 143 states have (on average 1.132867132867133) internal successors, (162), 145 states have internal predecessors, (162), 95 states have call successors, (95), 19 states have call predecessors, (95), 19 states have return successors, (94), 93 states have call predecessors, (94), 94 states have call successors, (94) [2021-12-06 21:46:08,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 351 transitions. [2021-12-06 21:46:08,384 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 351 transitions. Word has length 125 [2021-12-06 21:46:08,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:08,385 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 351 transitions. [2021-12-06 21:46:08,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 14 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (38), 12 states have call predecessors, (38), 13 states have call successors, (38) [2021-12-06 21:46:08,385 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 351 transitions. [2021-12-06 21:46:08,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 21:46:08,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:08,387 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:08,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 21:46:08,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:08,588 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:46:08,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:08,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1816082155, now seen corresponding path program 2 times [2021-12-06 21:46:08,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:08,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401322726] [2021-12-06 21:46:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:08,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:08,618 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:46:08,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234836032] [2021-12-06 21:46:08,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:46:08,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:08,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:46:08,622 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:46:08,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 21:46:08,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:46:08,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:46:08,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 21:46:08,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:46:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 143 proven. 64 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2021-12-06 21:46:11,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:46:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2021-12-06 21:46:13,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:13,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401322726] [2021-12-06 21:46:13,148 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:46:13,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234836032] [2021-12-06 21:46:13,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234836032] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:46:13,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:46:13,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 29 [2021-12-06 21:46:13,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009432021] [2021-12-06 21:46:13,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:46:13,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 21:46:13,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:13,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 21:46:13,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-12-06 21:46:13,150 INFO L87 Difference]: Start difference. First operand 258 states and 351 transitions. Second operand has 29 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 21 states have internal predecessors, (48), 15 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) [2021-12-06 21:46:29,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:29,229 INFO L93 Difference]: Finished difference Result 307 states and 414 transitions. [2021-12-06 21:46:29,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 21:46:29,230 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 21 states have internal predecessors, (48), 15 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) Word has length 134 [2021-12-06 21:46:29,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:29,231 INFO L225 Difference]: With dead ends: 307 [2021-12-06 21:46:29,232 INFO L226 Difference]: Without dead ends: 299 [2021-12-06 21:46:29,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=440, Invalid=2110, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 21:46:29,233 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 79 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:29,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 440 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2021-12-06 21:46:29,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-12-06 21:46:29,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 236. [2021-12-06 21:46:29,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 131 states have (on average 1.099236641221374) internal successors, (144), 132 states have internal predecessors, (144), 82 states have call successors, (82), 22 states have call predecessors, (82), 22 states have return successors, (82), 81 states have call predecessors, (82), 82 states have call successors, (82) [2021-12-06 21:46:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 308 transitions. [2021-12-06 21:46:29,289 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 308 transitions. Word has length 134 [2021-12-06 21:46:29,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:29,289 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 308 transitions. [2021-12-06 21:46:29,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 21 states have internal predecessors, (48), 15 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) [2021-12-06 21:46:29,289 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 308 transitions. [2021-12-06 21:46:29,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-06 21:46:29,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:29,291 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:29,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 21:46:29,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 21:46:29,491 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:46:29,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:29,492 INFO L85 PathProgramCache]: Analyzing trace with hash 2095255219, now seen corresponding path program 3 times [2021-12-06 21:46:29,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:29,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104720602] [2021-12-06 21:46:29,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:29,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:29,500 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:46:29,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854159151] [2021-12-06 21:46:29,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:46:29,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:29,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:46:29,501 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:46:29,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 21:46:33,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 21:46:33,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:46:33,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 21:46:33,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:46:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 168 proven. 41 refuted. 0 times theorem prover too weak. 1009 trivial. 0 not checked. [2021-12-06 21:46:35,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:46:36,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:36,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104720602] [2021-12-06 21:46:36,381 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:46:36,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854159151] [2021-12-06 21:46:36,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854159151] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:46:36,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:46:36,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-12-06 21:46:36,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785035704] [2021-12-06 21:46:36,381 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 21:46:36,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 21:46:36,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:36,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 21:46:36,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-12-06 21:46:36,382 INFO L87 Difference]: Start difference. First operand 236 states and 308 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2021-12-06 21:46:42,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:42,099 INFO L93 Difference]: Finished difference Result 335 states and 461 transitions. [2021-12-06 21:46:42,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 21:46:42,099 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 175 [2021-12-06 21:46:42,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:42,102 INFO L225 Difference]: With dead ends: 335 [2021-12-06 21:46:42,102 INFO L226 Difference]: Without dead ends: 333 [2021-12-06 21:46:42,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 21:46:42,103 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 33 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:42,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 369 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 21:46:42,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-06 21:46:42,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 328. [2021-12-06 21:46:42,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 172 states have (on average 1.127906976744186) internal successors, (194), 174 states have internal predecessors, (194), 130 states have call successors, (130), 25 states have call predecessors, (130), 25 states have return successors, (130), 128 states have call predecessors, (130), 130 states have call successors, (130) [2021-12-06 21:46:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 454 transitions. [2021-12-06 21:46:42,198 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 454 transitions. Word has length 175 [2021-12-06 21:46:42,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:42,199 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 454 transitions. [2021-12-06 21:46:42,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2021-12-06 21:46:42,199 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 454 transitions. [2021-12-06 21:46:42,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-06 21:46:42,201 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:42,201 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:42,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 21:46:42,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 21:46:42,402 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:46:42,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:42,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1062534286, now seen corresponding path program 4 times [2021-12-06 21:46:42,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:42,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767416004] [2021-12-06 21:46:42,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:42,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:42,437 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:46:42,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965239759] [2021-12-06 21:46:42,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 21:46:42,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:42,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:46:42,439 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:46:42,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 21:46:42,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 21:46:42,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:46:42,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 125 conjunts are in the unsatisfiable core [2021-12-06 21:46:42,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:46:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 279 proven. 396 refuted. 0 times theorem prover too weak. 978 trivial. 0 not checked. [2021-12-06 21:46:45,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:46:54,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:54,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767416004] [2021-12-06 21:46:54,503 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:46:54,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965239759] [2021-12-06 21:46:54,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965239759] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:46:54,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:46:54,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-12-06 21:46:54,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672960588] [2021-12-06 21:46:54,504 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 21:46:54,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 21:46:54,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:54,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 21:46:54,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2021-12-06 21:46:54,505 INFO L87 Difference]: Start difference. First operand 328 states and 454 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 12 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2021-12-06 21:46:59,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:59,307 INFO L93 Difference]: Finished difference Result 408 states and 561 transitions. [2021-12-06 21:46:59,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 21:46:59,309 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 12 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) Word has length 197 [2021-12-06 21:46:59,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:59,311 INFO L225 Difference]: With dead ends: 408 [2021-12-06 21:46:59,311 INFO L226 Difference]: Without dead ends: 406 [2021-12-06 21:46:59,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 200 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=335, Invalid=1387, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 21:46:59,312 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 43 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:59,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 947 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1290 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-06 21:46:59,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-12-06 21:46:59,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 400. [2021-12-06 21:46:59,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 210 states have (on average 1.1285714285714286) internal successors, (237), 212 states have internal predecessors, (237), 158 states have call successors, (158), 31 states have call predecessors, (158), 31 states have return successors, (158), 156 states have call predecessors, (158), 158 states have call successors, (158) [2021-12-06 21:46:59,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 553 transitions. [2021-12-06 21:46:59,422 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 553 transitions. Word has length 197 [2021-12-06 21:46:59,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:59,422 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 553 transitions. [2021-12-06 21:46:59,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 12 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2021-12-06 21:46:59,422 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 553 transitions. [2021-12-06 21:46:59,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-06 21:46:59,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:59,425 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:59,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-06 21:46:59,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 21:46:59,626 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:46:59,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:59,627 INFO L85 PathProgramCache]: Analyzing trace with hash -2042278159, now seen corresponding path program 5 times [2021-12-06 21:46:59,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:59,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37574672] [2021-12-06 21:46:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:59,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:59,659 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:46:59,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717383416] [2021-12-06 21:46:59,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 21:46:59,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:59,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:46:59,662 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:46:59,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 21:47:00,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-06 21:47:00,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:47:00,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-06 21:47:00,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:47:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2158 backedges. 230 proven. 275 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2021-12-06 21:47:08,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:47:54,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:47:54,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37574672] [2021-12-06 21:47:54,253 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:47:54,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717383416] [2021-12-06 21:47:54,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717383416] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:47:54,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:47:54,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-12-06 21:47:54,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252776973] [2021-12-06 21:47:54,254 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 21:47:54,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 21:47:54,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:47:54,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 21:47:54,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1109, Unknown=4, NotChecked=0, Total=1406 [2021-12-06 21:47:54,255 INFO L87 Difference]: Start difference. First operand 400 states and 553 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 22 states have internal predecessors, (45), 12 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 12 states have call predecessors, (37), 12 states have call successors, (37) [2021-12-06 21:48:03,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:48:03,302 INFO L93 Difference]: Finished difference Result 473 states and 636 transitions. [2021-12-06 21:48:03,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 21:48:03,303 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 22 states have internal predecessors, (45), 12 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 12 states have call predecessors, (37), 12 states have call successors, (37) Word has length 219 [2021-12-06 21:48:03,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:48:03,306 INFO L225 Difference]: With dead ends: 473 [2021-12-06 21:48:03,306 INFO L226 Difference]: Without dead ends: 471 [2021-12-06 21:48:03,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 294 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=502, Invalid=2146, Unknown=4, NotChecked=0, Total=2652 [2021-12-06 21:48:03,307 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 70 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-06 21:48:03,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 629 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-06 21:48:03,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-12-06 21:48:03,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 426. [2021-12-06 21:48:03,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 227 states have (on average 1.1233480176211454) internal successors, (255), 229 states have internal predecessors, (255), 162 states have call successors, (162), 36 states have call predecessors, (162), 36 states have return successors, (162), 160 states have call predecessors, (162), 162 states have call successors, (162) [2021-12-06 21:48:03,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 579 transitions. [2021-12-06 21:48:03,427 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 579 transitions. Word has length 219 [2021-12-06 21:48:03,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:48:03,427 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 579 transitions. [2021-12-06 21:48:03,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 22 states have internal predecessors, (45), 12 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 12 states have call predecessors, (37), 12 states have call successors, (37) [2021-12-06 21:48:03,428 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 579 transitions. [2021-12-06 21:48:03,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-06 21:48:03,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:48:03,430 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:48:03,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 21:48:03,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 21:48:03,630 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:48:03,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:48:03,631 INFO L85 PathProgramCache]: Analyzing trace with hash 474997075, now seen corresponding path program 6 times [2021-12-06 21:48:03,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:48:03,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872784792] [2021-12-06 21:48:03,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:48:03,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:48:03,639 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:48:03,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771258420] [2021-12-06 21:48:03,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 21:48:03,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:48:03,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:48:03,640 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:48:03,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 21:48:06,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 21:48:06,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:48:06,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 21:48:06,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:48:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2158 backedges. 235 proven. 131 refuted. 0 times theorem prover too weak. 1792 trivial. 0 not checked. [2021-12-06 21:48:09,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:48:10,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:48:10,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872784792] [2021-12-06 21:48:10,245 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:48:10,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771258420] [2021-12-06 21:48:10,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771258420] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:48:10,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:48:10,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-12-06 21:48:10,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095849871] [2021-12-06 21:48:10,245 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 21:48:10,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 21:48:10,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:48:10,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 21:48:10,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-12-06 21:48:10,246 INFO L87 Difference]: Start difference. First operand 426 states and 579 transitions. Second operand has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-12-06 21:48:13,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:48:13,857 INFO L93 Difference]: Finished difference Result 432 states and 584 transitions. [2021-12-06 21:48:13,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 21:48:13,858 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 219 [2021-12-06 21:48:13,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:48:13,858 INFO L225 Difference]: With dead ends: 432 [2021-12-06 21:48:13,858 INFO L226 Difference]: Without dead ends: 0 [2021-12-06 21:48:13,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-12-06 21:48:13,860 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:48:13,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 332 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 21:48:13,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-06 21:48:13,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-06 21:48:13,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 21:48:13,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-06 21:48:13,861 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 219 [2021-12-06 21:48:13,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:48:13,861 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 21:48:13,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-12-06 21:48:13,861 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-06 21:48:13,861 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-06 21:48:13,863 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 21:48:13,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 21:48:14,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:48:14,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-06 21:49:13,158 WARN L227 SmtUtils]: Spent 54.06s on a formula simplification. DAG size of input: 330 DAG size of output: 50 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-12-06 21:49:35,144 WARN L227 SmtUtils]: Spent 21.98s on a formula simplification. DAG size of input: 250 DAG size of output: 52 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-12-06 21:50:19,640 WARN L227 SmtUtils]: Spent 44.49s on a formula simplification. DAG size of input: 332 DAG size of output: 54 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-12-06 21:51:20,184 WARN L227 SmtUtils]: Spent 1.01m on a formula simplification. DAG size of input: 332 DAG size of output: 54 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-12-06 21:52:29,541 WARN L227 SmtUtils]: Spent 1.16m on a formula simplification. DAG size of input: 338 DAG size of output: 47 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-12-06 21:53:40,229 WARN L227 SmtUtils]: Spent 1.18m on a formula simplification. DAG size of input: 338 DAG size of output: 47 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-12-06 21:53:40,892 INFO L854 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse3 (<= |ULTIMATE.start_main_~x~0#1| 50)) (.cse4 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (.cse5 (<= 0 |ULTIMATE.start_main_~c~0#1|)) (.cse6 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse7 (<= |ULTIMATE.start_main_~y~0#1| 50)) (.cse8 (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~a~0#1|)) (.cse9 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))))) (or (and (< 0 |ULTIMATE.start_main_~b~0#1|) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse7 .cse8 .cse9) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse6 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse7 .cse8 .cse9 (= |ULTIMATE.start_main_~s~0#1| 1)))) [2021-12-06 21:53:40,892 INFO L854 garLoopResultBuilder]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse5 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (let ((.cse0 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse2 (<= |ULTIMATE.start_main_~x~0#1| 50)) (.cse3 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (.cse4 (<= 0 |ULTIMATE.start_main_~c~0#1|)) (.cse6 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse7 (<= |ULTIMATE.start_main_~y~0#1| 50)) (.cse8 (= |ULTIMATE.start_main_~a~0#1| .cse5))) (or (and (<= 0 |ULTIMATE.start_main_~b~0#1|) (not (= |ULTIMATE.start_main_~b~0#1| 0)) .cse0 (not (= |ULTIMATE.start_main_~y~0#1| 0)) (<= 0 |ULTIMATE.start_main_~y~0#1|) .cse1 .cse2 .cse3 .cse4 (= .cse5 (+ |ULTIMATE.start_main_~c~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~q~0#1|))) .cse6 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse7 .cse8) (and .cse0 (<= 1 |ULTIMATE.start_main_~y~0#1|) .cse1 .cse2 .cse3 .cse4 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse6 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse7 (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~a~0#1|) .cse8 (= |ULTIMATE.start_main_~s~0#1| 1))))) [2021-12-06 21:53:40,892 INFO L861 garLoopResultBuilder]: At program point L73(lines 18 74) the Hoare annotation is: true [2021-12-06 21:53:40,892 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-06 21:53:40,892 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-06 21:53:40,892 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-06 21:53:40,892 INFO L854 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 50)) [2021-12-06 21:53:40,893 INFO L854 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 50) (<= |ULTIMATE.start_main_~y~0#1| 50)) [2021-12-06 21:53:40,893 INFO L854 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse5 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (let ((.cse0 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse2 (<= |ULTIMATE.start_main_~x~0#1| 50)) (.cse3 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (.cse4 (<= 0 |ULTIMATE.start_main_~c~0#1|)) (.cse6 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse7 (<= |ULTIMATE.start_main_~y~0#1| 50)) (.cse8 (= |ULTIMATE.start_main_~a~0#1| .cse5))) (or (and (<= 0 |ULTIMATE.start_main_~b~0#1|) (not (= |ULTIMATE.start_main_~b~0#1| 0)) .cse0 (not (= |ULTIMATE.start_main_~y~0#1| 0)) (<= 0 |ULTIMATE.start_main_~y~0#1|) .cse1 .cse2 .cse3 .cse4 (= .cse5 (+ |ULTIMATE.start_main_~c~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~q~0#1|))) .cse6 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse7 .cse8) (and .cse0 (<= 1 |ULTIMATE.start_main_~y~0#1|) .cse1 .cse2 .cse3 .cse4 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse6 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse7 (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~a~0#1|) .cse8 (= |ULTIMATE.start_main_~s~0#1| 1))))) [2021-12-06 21:53:40,893 INFO L854 garLoopResultBuilder]: At program point L41-1(lines 39 68) the Hoare annotation is: (let ((.cse7 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (let ((.cse0 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse2 (<= |ULTIMATE.start_main_~x~0#1| 50)) (.cse3 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (.cse4 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse5 (<= |ULTIMATE.start_main_~y~0#1| 50)) (.cse6 (= |ULTIMATE.start_main_~a~0#1| .cse7))) (or (and .cse0 .cse1 .cse2 .cse3 (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse4 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse5 .cse6 (= |ULTIMATE.start_main_~s~0#1| 1)) (and (or (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) (not (= |ULTIMATE.start_main_~c~0#1| 0)) (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~s~0#1|)) .cse7)) (<= 0 |ULTIMATE.start_main_~b~0#1|) .cse0 (<= 1 |ULTIMATE.start_main_~y~0#1|) .cse1 .cse2 .cse3 (<= 0 |ULTIMATE.start_main_~c~0#1|) .cse4 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse5 .cse6)))) [2021-12-06 21:53:40,893 INFO L854 garLoopResultBuilder]: At program point L41-2(lines 41 68) the Hoare annotation is: (let ((.cse0 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (and (<= 1 |ULTIMATE.start_main_~y~0#1|) (= 0 .cse0) (= |ULTIMATE.start_main_~b~0#1| .cse0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))))) [2021-12-06 21:53:40,893 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-06 21:53:40,893 INFO L854 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 50) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 50)) [2021-12-06 21:53:40,893 INFO L854 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse6 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (let ((.cse0 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse3 (<= |ULTIMATE.start_main_~x~0#1| 50)) (.cse4 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (.cse5 (<= 0 |ULTIMATE.start_main_~c~0#1|)) (.cse7 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse8 (<= |ULTIMATE.start_main_~y~0#1| 50)) (.cse9 (= |ULTIMATE.start_main_~a~0#1| .cse6))) (or (and (< 0 |ULTIMATE.start_main_~b~0#1|) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (= .cse6 (+ |ULTIMATE.start_main_~c~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~q~0#1|))) .cse7 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse8 .cse9) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse7 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse8 (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~a~0#1|) .cse9 (= |ULTIMATE.start_main_~s~0#1| 1))))) [2021-12-06 21:53:40,893 INFO L858 garLoopResultBuilder]: For program point L42(lines 42 43) no Hoare annotation was computed. [2021-12-06 21:53:40,893 INFO L854 garLoopResultBuilder]: At program point L71(line 71) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) [2021-12-06 21:53:40,893 INFO L854 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (and (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 50) (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 50) (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (= |ULTIMATE.start_main_~s~0#1| 1)) [2021-12-06 21:53:40,893 INFO L854 garLoopResultBuilder]: At program point L38-1(line 38) the Hoare annotation is: (and (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 50) (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 50) (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (= |ULTIMATE.start_main_~s~0#1| 1)) [2021-12-06 21:53:40,893 INFO L858 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2021-12-06 21:53:40,893 INFO L861 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2021-12-06 21:53:40,894 INFO L858 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-12-06 21:53:40,894 INFO L858 garLoopResultBuilder]: For program point L51(lines 47 56) no Hoare annotation was computed. [2021-12-06 21:53:40,894 INFO L854 garLoopResultBuilder]: At program point L47-2(lines 47 56) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse3 (<= |ULTIMATE.start_main_~x~0#1| 50)) (.cse4 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (.cse5 (<= 0 |ULTIMATE.start_main_~c~0#1|)) (.cse6 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse7 (<= |ULTIMATE.start_main_~y~0#1| 50)) (.cse8 (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~a~0#1|)) (.cse9 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))))) (or (and (< 0 |ULTIMATE.start_main_~b~0#1|) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse7 .cse8 .cse9) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse6 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse7 .cse8 .cse9 (= |ULTIMATE.start_main_~s~0#1| 1)))) [2021-12-06 21:53:40,894 INFO L858 garLoopResultBuilder]: For program point L47-3(lines 47 56) no Hoare annotation was computed. [2021-12-06 21:53:40,894 INFO L858 garLoopResultBuilder]: For program point L72(line 72) no Hoare annotation was computed. [2021-12-06 21:53:40,894 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-12-06 21:53:40,894 INFO L858 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-12-06 21:53:40,894 INFO L858 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-12-06 21:53:40,894 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-12-06 21:53:40,894 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-12-06 21:53:40,894 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-12-06 21:53:40,894 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-12-06 21:53:40,894 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-12-06 21:53:40,894 INFO L858 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-12-06 21:53:40,894 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-12-06 21:53:40,897 INFO L732 BasicCegarLoop]: Path program histogram: [6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:53:40,897 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 21:53:40,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 09:53:40 BoogieIcfgContainer [2021-12-06 21:53:40,911 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 21:53:40,911 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 21:53:40,911 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 21:53:40,911 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 21:53:40,911 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:45:12" (3/4) ... [2021-12-06 21:53:40,913 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-06 21:53:40,918 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-12-06 21:53:40,918 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-06 21:53:40,921 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-12-06 21:53:40,921 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-06 21:53:40,921 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-06 21:53:40,922 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-06 21:53:40,946 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 21:53:40,946 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 21:53:40,947 INFO L158 Benchmark]: Toolchain (without parser) took 508390.57ms. Allocated memory was 151.0MB in the beginning and 222.3MB in the end (delta: 71.3MB). Free memory was 111.8MB in the beginning and 158.1MB in the end (delta: -46.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2021-12-06 21:53:40,947 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 151.0MB. Free memory is still 128.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 21:53:40,947 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.51ms. Allocated memory is still 151.0MB. Free memory was 111.6MB in the beginning and 101.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 21:53:40,947 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.36ms. Allocated memory is still 151.0MB. Free memory was 101.2MB in the beginning and 99.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 21:53:40,947 INFO L158 Benchmark]: Boogie Preprocessor took 16.30ms. Allocated memory is still 151.0MB. Free memory was 99.5MB in the beginning and 98.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 21:53:40,948 INFO L158 Benchmark]: RCFGBuilder took 225.34ms. Allocated memory is still 151.0MB. Free memory was 98.4MB in the beginning and 129.0MB in the end (delta: -30.6MB). Peak memory consumption was 16.6MB. Max. memory is 16.1GB. [2021-12-06 21:53:40,948 INFO L158 Benchmark]: TraceAbstraction took 507910.29ms. Allocated memory was 151.0MB in the beginning and 222.3MB in the end (delta: 71.3MB). Free memory was 128.4MB in the beginning and 162.3MB in the end (delta: -34.0MB). Peak memory consumption was 136.5MB. Max. memory is 16.1GB. [2021-12-06 21:53:40,948 INFO L158 Benchmark]: Witness Printer took 35.48ms. Allocated memory is still 222.3MB. Free memory was 162.3MB in the beginning and 158.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-06 21:53:40,949 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 151.0MB. Free memory is still 128.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 172.51ms. Allocated memory is still 151.0MB. Free memory was 111.6MB in the beginning and 101.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.36ms. Allocated memory is still 151.0MB. Free memory was 101.2MB in the beginning and 99.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.30ms. Allocated memory is still 151.0MB. Free memory was 99.5MB in the beginning and 98.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 225.34ms. Allocated memory is still 151.0MB. Free memory was 98.4MB in the beginning and 129.0MB in the end (delta: -30.6MB). Peak memory consumption was 16.6MB. Max. memory is 16.1GB. * TraceAbstraction took 507910.29ms. Allocated memory was 151.0MB in the beginning and 222.3MB in the end (delta: 71.3MB). Free memory was 128.4MB in the beginning and 162.3MB in the end (delta: -34.0MB). Peak memory consumption was 136.5MB. Max. memory is 16.1GB. * Witness Printer took 35.48ms. Allocated memory is still 222.3MB. Free memory was 162.3MB in the beginning and 158.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 507.8s, OverallIterations: 19, TraceHistogramMax: 32, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 66.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 326.8s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 697 SdHoareTripleChecker+Valid, 41.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 591 mSDsluCounter, 5838 SdHoareTripleChecker+Invalid, 40.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5005 mSDsCounter, 1015 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7715 IncrementalHoareTripleChecker+Invalid, 8736 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1015 mSolverCounterUnsat, 833 mSDtfsCounter, 7715 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2926 GetRequests, 2521 SyntacticMatches, 26 SemanticMatches, 379 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2487 ImplicationChecksByTransitivity, 72.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=426occurred in iteration=18, InterpolantAutomatonStates: 264, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 19 MinimizatonAttempts, 211 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 17 LocationsWithAnnotation, 227 PreInvPairs, 448 NumberOfFragments, 976 HoareAnnotationTreeSize, 227 FomulaSimplifications, 30593 FormulaSimplificationTreeSizeReduction, 4.8s HoareSimplificationTime, 17 FomulaSimplificationsInter, 116710 FormulaSimplificationTreeSizeReductionInter, 322.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 7.7s SatisfiabilityAnalysisTime, 101.9s InterpolantComputationTime, 1931 NumberOfCodeBlocks, 1636 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 2593 ConstructedInterpolants, 0 QuantifiedInterpolants, 18508 SizeOfPredicates, 138 NumberOfNonLiveVariables, 3953 ConjunctsInSsa, 682 ConjunctsInUnsatCore, 28 InterpolantComputations, 5 PerfectInterpolantSequences, 10796/11979 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: (((((((((((0 < b && yy == y * y) && 1 <= y) && y * x == xy) && x <= 50) && b == x * q + y * s) && 0 <= c) && 1 <= x) && b < a) && y <= 50) && k * b + c == a) && a == x * p + y * r) || (((((((((((((yy == y * y && 1 <= y) && y * x == xy) && x <= 50) && b == x * q + y * s) && 0 <= c) && r == 0) && q == 0) && 1 <= x) && a == x) && y <= 50) && k * b + c == a) && a == x * p + y * r) && s == 1) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: (((((((((((yy == y * y && y * x == xy) && x <= 50) && b == x * q + y * s) && 1 <= b) && r == 0) && q == 0) && 1 <= x) && a == x) && y <= 50) && a == x * p + y * r) && s == 1) || (((((((((((((b <= c || !(c == 0)) || k * x * q + y * k * s == x * p + y * r) && 0 <= b) && yy == y * y) && 1 <= y) && y * x == xy) && x <= 50) && b == x * q + y * s) && 0 <= c) && 1 <= x) && b < a) && y <= 50) && a == x * p + y * r) RESULT: Ultimate proved your program to be correct! [2021-12-06 21:53:41,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655b06b6-af41-4229-a9de-5ef643147869/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE