./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0 --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 603eeec29f0f7a499f451ec7fa1906f0a8c90a729e0fc96740e12a91ea711946 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:35:52,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:35:52,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:35:52,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:35:52,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:35:52,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:35:52,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:35:52,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:35:52,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:35:52,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:35:52,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:35:52,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:35:52,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:35:52,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:35:52,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:35:52,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:35:52,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:35:52,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:35:52,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:35:52,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:35:52,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:35:52,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:35:52,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:35:52,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:35:52,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:35:52,853 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:35:52,854 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:35:52,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:35:52,857 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:35:52,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:35:52,859 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:35:52,860 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:35:52,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:35:52,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:35:52,866 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:35:52,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:35:52,867 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:35:52,867 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:35:52,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:35:52,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:35:52,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:35:52,871 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:35:52,922 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:35:52,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:35:52,924 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:35:52,931 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:35:52,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:35:52,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:35:52,934 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:35:52,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:35:52,935 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:35:52,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:35:52,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:35:52,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:35:52,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:35:52,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:35:52,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:35:52,938 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:35:52,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:35:52,939 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:35:52,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:35:52,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:35:52,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:35:52,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:35:52,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:35:52,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:35:52,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:35:52,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:35:52,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:35:52,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:35:52,943 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:35:52,945 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:35:52,945 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:35:52,945 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:35:52,946 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_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 603eeec29f0f7a499f451ec7fa1906f0a8c90a729e0fc96740e12a91ea711946 [2021-11-22 15:35:53,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:35:53,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:35:53,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:35:53,349 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:35:53,350 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:35:53,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c [2021-11-22 15:35:53,429 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/data/67a4089aa/a13508916108471ca9861e41c468a19d/FLAG62c4b44a9 [2021-11-22 15:35:53,967 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:35:53,967 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c [2021-11-22 15:35:53,979 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/data/67a4089aa/a13508916108471ca9861e41c468a19d/FLAG62c4b44a9 [2021-11-22 15:35:54,323 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/data/67a4089aa/a13508916108471ca9861e41c468a19d [2021-11-22 15:35:54,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:35:54,329 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:35:54,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:35:54,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:35:54,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:35:54,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:35:54" (1/1) ... [2021-11-22 15:35:54,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@171ac31e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:35:54, skipping insertion in model container [2021-11-22 15:35:54,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:35:54" (1/1) ... [2021-11-22 15:35:54,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:35:54,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:35:54,604 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_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c[537,550] [2021-11-22 15:35:54,629 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:35:54,639 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:35:54,654 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_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c[537,550] [2021-11-22 15:35:54,663 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:35:54,682 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:35:54,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:35:54 WrapperNode [2021-11-22 15:35:54,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:35:54,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:35:54,687 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:35:54,687 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:35:54,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:35:54" (1/1) ... [2021-11-22 15:35:54,706 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:35:54" (1/1) ... [2021-11-22 15:35:54,738 INFO L137 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 100 [2021-11-22 15:35:54,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:35:54,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:35:54,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:35:54,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:35:54,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:35:54" (1/1) ... [2021-11-22 15:35:54,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:35:54" (1/1) ... [2021-11-22 15:35:54,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:35:54" (1/1) ... [2021-11-22 15:35:54,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:35:54" (1/1) ... [2021-11-22 15:35:54,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:35:54" (1/1) ... [2021-11-22 15:35:54,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:35:54" (1/1) ... [2021-11-22 15:35:54,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:35:54" (1/1) ... [2021-11-22 15:35:54,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:35:54,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:35:54,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:35:54,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:35:54,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:35:54" (1/1) ... [2021-11-22 15:35:54,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:35:54,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:35:54,832 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:35:54,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:35:54,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:35:54,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:35:54,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:35:54,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:35:54,944 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:35:54,946 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:35:55,182 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:35:55,189 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:35:55,189 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-22 15:35:55,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:35:55 BoogieIcfgContainer [2021-11-22 15:35:55,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:35:55,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:35:55,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:35:55,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:35:55,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:35:54" (1/3) ... [2021-11-22 15:35:55,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e15c20d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:35:55, skipping insertion in model container [2021-11-22 15:35:55,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:35:54" (2/3) ... [2021-11-22 15:35:55,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e15c20d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:35:55, skipping insertion in model container [2021-11-22 15:35:55,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:35:55" (3/3) ... [2021-11-22 15:35:55,226 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound2.c [2021-11-22 15:35:55,233 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:35:55,233 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-22 15:35:55,356 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:35:55,363 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 [2021-11-22 15:35:55,363 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-22 15:35:55,384 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 42 states have internal predecessors, (57), 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) [2021-11-22 15:35:55,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-22 15:35:55,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:35:55,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:35:55,393 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 15:35:55,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:35:55,399 INFO L85 PathProgramCache]: Analyzing trace with hash 119446382, now seen corresponding path program 1 times [2021-11-22 15:35:55,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:35:55,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363788643] [2021-11-22 15:35:55,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:35:55,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:35:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:35:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:35:55,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:35:55,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363788643] [2021-11-22 15:35:55,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363788643] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:35:55,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:35:55,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:35:55,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985705639] [2021-11-22 15:35:55,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:35:55,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 15:35:55,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:35:55,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 15:35:55,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 15:35:55,646 INFO L87 Difference]: Start difference. First operand has 43 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 42 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-11-22 15:35:55,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:35:55,668 INFO L93 Difference]: Finished difference Result 83 states and 110 transitions. [2021-11-22 15:35:55,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 15:35:55,671 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-22 15:35:55,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:35:55,682 INFO L225 Difference]: With dead ends: 83 [2021-11-22 15:35:55,682 INFO L226 Difference]: Without dead ends: 39 [2021-11-22 15:35:55,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 15:35:55,690 INFO L933 BasicCegarLoop]: 47 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, 47 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 [2021-11-22 15:35:55,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:35:55,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-22 15:35:55,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-22 15:35:55,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.34375) internal successors, (43), 38 states have internal predecessors, (43), 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) [2021-11-22 15:35:55,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-22 15:35:55,735 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 8 [2021-11-22 15:35:55,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:35:55,736 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-22 15:35:55,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-11-22 15:35:55,736 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-22 15:35:55,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-22 15:35:55,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:35:55,738 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:35:55,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:35:55,738 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 15:35:55,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:35:55,739 INFO L85 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-11-22 15:35:55,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:35:55,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970460695] [2021-11-22 15:35:55,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:35:55,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:35:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:35:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:35:55,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:35:55,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970460695] [2021-11-22 15:35:55,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970460695] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:35:55,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:35:55,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:35:55,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331156666] [2021-11-22 15:35:55,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:35:55,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:35:55,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:35:55,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:35:55,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:35:55,831 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-22 15:35:55,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:35:55,908 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-11-22 15:35:55,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:35:55,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-22 15:35:55,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:35:55,911 INFO L225 Difference]: With dead ends: 64 [2021-11-22 15:35:55,911 INFO L226 Difference]: Without dead ends: 62 [2021-11-22 15:35:55,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:35:55,913 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 54 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:35:55,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 75 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:35:55,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-22 15:35:55,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 37. [2021-11-22 15:35:55,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:35:55,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-11-22 15:35:55,922 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 8 [2021-11-22 15:35:55,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:35:55,923 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-11-22 15:35:55,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-22 15:35:55,923 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-11-22 15:35:55,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-22 15:35:55,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:35:55,924 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:35:55,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 15:35:55,930 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 15:35:55,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:35:55,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1986040785, now seen corresponding path program 1 times [2021-11-22 15:35:55,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:35:55,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698630284] [2021-11-22 15:35:55,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:35:55,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:35:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:35:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:35:55,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:35:55,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698630284] [2021-11-22 15:35:55,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698630284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:35:55,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:35:55,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:35:55,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986173602] [2021-11-22 15:35:55,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:35:55,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:35:56,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:35:56,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:35:56,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:35:56,001 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:35:56,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:35:56,037 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2021-11-22 15:35:56,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:35:56,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-22 15:35:56,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:35:56,039 INFO L225 Difference]: With dead ends: 59 [2021-11-22 15:35:56,039 INFO L226 Difference]: Without dead ends: 39 [2021-11-22 15:35:56,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:35:56,041 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:35:56,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:35:56,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-22 15:35:56,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-22 15:35:56,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.303030303030303) internal successors, (43), 38 states have internal predecessors, (43), 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) [2021-11-22 15:35:56,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-22 15:35:56,051 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 10 [2021-11-22 15:35:56,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:35:56,051 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-22 15:35:56,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:35:56,052 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-22 15:35:56,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-22 15:35:56,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:35:56,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:35:56,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 15:35:56,053 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 15:35:56,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:35:56,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1985334737, now seen corresponding path program 1 times [2021-11-22 15:35:56,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:35:56,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823144052] [2021-11-22 15:35:56,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:35:56,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:35:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:35:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:35:56,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:35:56,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823144052] [2021-11-22 15:35:56,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823144052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:35:56,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:35:56,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:35:56,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429297071] [2021-11-22 15:35:56,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:35:56,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:35:56,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:35:56,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:35:56,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:35:56,135 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:35:56,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:35:56,223 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-11-22 15:35:56,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:35:56,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-22 15:35:56,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:35:56,225 INFO L225 Difference]: With dead ends: 59 [2021-11-22 15:35:56,225 INFO L226 Difference]: Without dead ends: 57 [2021-11-22 15:35:56,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:35:56,227 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 47 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:35:56,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 63 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:35:56,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-22 15:35:56,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 37. [2021-11-22 15:35:56,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:35:56,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-11-22 15:35:56,237 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 10 [2021-11-22 15:35:56,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:35:56,238 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-11-22 15:35:56,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:35:56,238 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-11-22 15:35:56,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-22 15:35:56,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:35:56,239 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:35:56,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 15:35:56,240 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 15:35:56,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:35:56,241 INFO L85 PathProgramCache]: Analyzing trace with hash -941046702, now seen corresponding path program 1 times [2021-11-22 15:35:56,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:35:56,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381259748] [2021-11-22 15:35:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:35:56,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:35:56,268 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:35:56,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420951364] [2021-11-22 15:35:56,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:35:56,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:35:56,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:35:56,277 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:35:56,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:35:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:35:56,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 15:35:56,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:35:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:35:56,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:35:56,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:35:56,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381259748] [2021-11-22 15:35:56,522 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:35:56,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420951364] [2021-11-22 15:35:56,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420951364] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:35:56,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:35:56,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:35:56,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383075132] [2021-11-22 15:35:56,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:35:56,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:35:56,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:35:56,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:35:56,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:35:56,526 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:35:58,626 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-22 15:35:58,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:35:58,841 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2021-11-22 15:35:58,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:35:58,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-22 15:35:58,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:35:58,843 INFO L225 Difference]: With dead ends: 70 [2021-11-22 15:35:58,843 INFO L226 Difference]: Without dead ends: 62 [2021-11-22 15:35:58,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:35:58,845 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 29 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:35:58,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 76 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-22 15:35:58,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-22 15:35:58,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-11-22 15:35:58,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 52 states have internal predecessors, (61), 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) [2021-11-22 15:35:58,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-11-22 15:35:58,856 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 12 [2021-11-22 15:35:58,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:35:58,856 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-11-22 15:35:58,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:35:58,856 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-11-22 15:35:58,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 15:35:58,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:35:58,857 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:35:58,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-22 15:35:59,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:35:59,065 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 15:35:59,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:35:59,066 INFO L85 PathProgramCache]: Analyzing trace with hash 12618603, now seen corresponding path program 1 times [2021-11-22 15:35:59,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:35:59,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446195500] [2021-11-22 15:35:59,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:35:59,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:35:59,091 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:35:59,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117882530] [2021-11-22 15:35:59,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:35:59,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:35:59,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:35:59,093 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:35:59,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 15:35:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:35:59,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 15:35:59,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:35:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:35:59,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:35:59,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:35:59,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446195500] [2021-11-22 15:35:59,575 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:35:59,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117882530] [2021-11-22 15:35:59,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117882530] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:35:59,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:35:59,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:35:59,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135519418] [2021-11-22 15:35:59,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:35:59,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:35:59,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:35:59,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:35:59,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:35:59,579 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-11-22 15:36:01,630 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 [] [2021-11-22 15:36:01,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:01,981 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2021-11-22 15:36:01,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 15:36:01,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-22 15:36:01,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:01,983 INFO L225 Difference]: With dead ends: 73 [2021-11-22 15:36:01,984 INFO L226 Difference]: Without dead ends: 67 [2021-11-22 15:36:01,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:36:01,986 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:01,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 105 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 72 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-22 15:36:01,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-22 15:36:02,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-11-22 15:36:02,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.25) internal successors, (70), 60 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:02,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-11-22 15:36:02,018 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 17 [2021-11-22 15:36:02,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:02,019 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-11-22 15:36:02,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-11-22 15:36:02,019 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-11-22 15:36:02,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 15:36:02,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:02,020 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:36:02,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 15:36:02,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:36:02,221 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 15:36:02,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:02,222 INFO L85 PathProgramCache]: Analyzing trace with hash -463138512, now seen corresponding path program 1 times [2021-11-22 15:36:02,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:02,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466148566] [2021-11-22 15:36:02,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:02,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:02,235 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:36:02,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119216804] [2021-11-22 15:36:02,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:02,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:36:02,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:36:02,237 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:36:02,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 15:36:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:02,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 15:36:02,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:36:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:02,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:36:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:02,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:02,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466148566] [2021-11-22 15:36:02,529 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:36:02,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119216804] [2021-11-22 15:36:02,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119216804] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:36:02,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:36:02,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-22 15:36:02,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73484330] [2021-11-22 15:36:02,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:36:02,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:36:02,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:02,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:36:02,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:36:02,532 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2021-11-22 15:36:02,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:02,586 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2021-11-22 15:36:02,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:36:02,586 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-22 15:36:02,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:02,591 INFO L225 Difference]: With dead ends: 83 [2021-11-22 15:36:02,591 INFO L226 Difference]: Without dead ends: 63 [2021-11-22 15:36:02,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:36:02,594 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:02,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 134 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:36:02,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-22 15:36:02,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-22 15:36:02,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 62 states have internal predecessors, (72), 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) [2021-11-22 15:36:02,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-11-22 15:36:02,610 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 19 [2021-11-22 15:36:02,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:02,610 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-11-22 15:36:02,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2021-11-22 15:36:02,611 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-11-22 15:36:02,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-22 15:36:02,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:02,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:36:02,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 15:36:02,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:36:02,833 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 15:36:02,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:02,834 INFO L85 PathProgramCache]: Analyzing trace with hash -2015810285, now seen corresponding path program 1 times [2021-11-22 15:36:02,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:02,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278573117] [2021-11-22 15:36:02,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:02,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:02,847 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:36:02,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853731602] [2021-11-22 15:36:02,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:02,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:36:02,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:36:02,849 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:36:02,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 15:36:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:03,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 15:36:03,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:36:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:03,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:36:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:06,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:06,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278573117] [2021-11-22 15:36:06,955 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:36:06,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853731602] [2021-11-22 15:36:06,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853731602] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:36:06,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:36:06,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2021-11-22 15:36:06,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65460457] [2021-11-22 15:36:06,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:36:06,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 15:36:06,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:06,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 15:36:06,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:36:06,958 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:11,040 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-22 15:36:16,010 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 [] [2021-11-22 15:36:16,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:16,021 INFO L93 Difference]: Finished difference Result 114 states and 127 transitions. [2021-11-22 15:36:16,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 15:36:16,022 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-22 15:36:16,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:16,023 INFO L225 Difference]: With dead ends: 114 [2021-11-22 15:36:16,023 INFO L226 Difference]: Without dead ends: 102 [2021-11-22 15:36:16,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-11-22 15:36:16,026 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 236 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 38 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:16,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 151 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 86 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2021-11-22 15:36:16,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-22 15:36:16,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-11-22 15:36:16,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 76 states have (on average 1.236842105263158) internal successors, (94), 79 states have internal predecessors, (94), 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) [2021-11-22 15:36:16,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2021-11-22 15:36:16,036 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 21 [2021-11-22 15:36:16,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:16,037 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2021-11-22 15:36:16,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:16,037 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2021-11-22 15:36:16,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-22 15:36:16,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:16,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:36:16,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 15:36:16,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-22 15:36:16,244 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 15:36:16,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:16,244 INFO L85 PathProgramCache]: Analyzing trace with hash -850742503, now seen corresponding path program 1 times [2021-11-22 15:36:16,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:16,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137623030] [2021-11-22 15:36:16,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:16,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:16,262 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:36:16,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200403505] [2021-11-22 15:36:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:16,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:36:16,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:36:16,264 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:36:16,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 15:36:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:16,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 15:36:16,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:36:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:16,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:36:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:16,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:16,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137623030] [2021-11-22 15:36:16,573 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:36:16,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200403505] [2021-11-22 15:36:16,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200403505] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:36:16,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:36:16,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-11-22 15:36:16,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365104124] [2021-11-22 15:36:16,574 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:36:16,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:36:16,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:16,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:36:16,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:36:16,576 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-11-22 15:36:16,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:16,621 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2021-11-22 15:36:16,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:36:16,622 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-22 15:36:16,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:16,623 INFO L225 Difference]: With dead ends: 95 [2021-11-22 15:36:16,623 INFO L226 Difference]: Without dead ends: 57 [2021-11-22 15:36:16,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:36:16,625 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 43 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:16,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 86 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:36:16,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-22 15:36:16,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-11-22 15:36:16,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 45 states have internal predecessors, (49), 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) [2021-11-22 15:36:16,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-11-22 15:36:16,634 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 25 [2021-11-22 15:36:16,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:16,635 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-11-22 15:36:16,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-11-22 15:36:16,635 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-11-22 15:36:16,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-22 15:36:16,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:16,637 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 15:36:16,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 15:36:16,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:36:16,853 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 15:36:16,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:16,854 INFO L85 PathProgramCache]: Analyzing trace with hash -603239529, now seen corresponding path program 1 times [2021-11-22 15:36:16,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:16,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304323040] [2021-11-22 15:36:16,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:16,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:16,866 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:36:16,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122975434] [2021-11-22 15:36:16,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:16,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:36:16,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:36:16,868 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:36:16,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e3b5ed1-e03a-4bbc-9bfd-60ba81b735d3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process