./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0209c9293388eb915387172d6fa3be69dfb35a1de5258b69ac610130c33e2610 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:37:29,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:37:29,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:37:29,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:37:29,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:37:29,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:37:29,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:37:29,861 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:37:29,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:37:29,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:37:29,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:37:29,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:37:29,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:37:29,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:37:29,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:37:29,893 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:37:29,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:37:29,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:37:29,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:37:29,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:37:29,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:37:29,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:37:29,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:37:29,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:37:29,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:37:29,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:37:29,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:37:29,934 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:37:29,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:37:29,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:37:29,938 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:37:29,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:37:29,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:37:29,943 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:37:29,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:37:29,945 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:37:29,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:37:29,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:37:29,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:37:29,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:37:29,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:37:29,951 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:37:30,007 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:37:30,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:37:30,008 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:37:30,008 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:37:30,018 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:37:30,018 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:37:30,018 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:37:30,019 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:37:30,019 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:37:30,019 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:37:30,021 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:37:30,021 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:37:30,021 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:37:30,021 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:37:30,022 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:37:30,022 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:37:30,022 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:37:30,023 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:37:30,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:37:30,024 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:37:30,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:37:30,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:37:30,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:37:30,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:37:30,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:37:30,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:37:30,027 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:37:30,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:37:30,028 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:37:30,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:37:30,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:37:30,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:37:30,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:37:30,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:37:30,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:37:30,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:37:30,031 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:37:30,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:37:30,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:37:30,031 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:37:30,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:37:30,032 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0209c9293388eb915387172d6fa3be69dfb35a1de5258b69ac610130c33e2610 [2021-11-25 18:37:30,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:37:30,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:37:30,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:37:30,404 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:37:30,405 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:37:30,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c [2021-11-25 18:37:30,490 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/data/74a62ef4d/c75a4415f470475a9054950f2611c4a1/FLAG3898388d1 [2021-11-25 18:37:31,028 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:37:31,029 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c [2021-11-25 18:37:31,037 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/data/74a62ef4d/c75a4415f470475a9054950f2611c4a1/FLAG3898388d1 [2021-11-25 18:37:31,392 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/data/74a62ef4d/c75a4415f470475a9054950f2611c4a1 [2021-11-25 18:37:31,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:37:31,398 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:37:31,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:37:31,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:37:31,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:37:31,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:37:31" (1/1) ... [2021-11-25 18:37:31,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c9aae79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:31, skipping insertion in model container [2021-11-25 18:37:31,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:37:31" (1/1) ... [2021-11-25 18:37:31,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:37:31,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:37:31,658 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_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c[964,977] [2021-11-25 18:37:31,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:37:31,676 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:37:31,695 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_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c[964,977] [2021-11-25 18:37:31,697 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:37:31,713 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:37:31,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:31 WrapperNode [2021-11-25 18:37:31,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:37:31,715 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:37:31,715 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:37:31,715 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:37:31,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:31" (1/1) ... [2021-11-25 18:37:31,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:31" (1/1) ... [2021-11-25 18:37:31,764 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 44 [2021-11-25 18:37:31,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:37:31,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:37:31,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:37:31,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:37:31,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:31" (1/1) ... [2021-11-25 18:37:31,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:31" (1/1) ... [2021-11-25 18:37:31,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:31" (1/1) ... [2021-11-25 18:37:31,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:31" (1/1) ... [2021-11-25 18:37:31,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:31" (1/1) ... [2021-11-25 18:37:31,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:31" (1/1) ... [2021-11-25 18:37:31,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:31" (1/1) ... [2021-11-25 18:37:31,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:37:31,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:37:31,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:37:31,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:37:31,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:31" (1/1) ... [2021-11-25 18:37:31,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:37:31,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:31,851 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:37:31,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:37:31,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:37:31,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:37:31,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:37:31,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:37:32,000 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:37:32,002 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:37:32,169 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:37:32,181 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:37:32,182 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 18:37:32,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:37:32 BoogieIcfgContainer [2021-11-25 18:37:32,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:37:32,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:37:32,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:37:32,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:37:32,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:37:31" (1/3) ... [2021-11-25 18:37:32,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156be5fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:37:32, skipping insertion in model container [2021-11-25 18:37:32,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:31" (2/3) ... [2021-11-25 18:37:32,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156be5fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:37:32, skipping insertion in model container [2021-11-25 18:37:32,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:37:32" (3/3) ... [2021-11-25 18:37:32,197 INFO L111 eAbstractionObserver]: Analyzing ICFG Muller_Kahan.c.p+cfa-reducer.c [2021-11-25 18:37:32,202 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:37:32,203 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:37:32,261 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:37:32,270 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=FINITE_AUTOMATA, 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 [2021-11-25 18:37:32,270 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:37:32,287 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:37:32,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 18:37:32,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:32,294 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:37:32,295 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:37:32,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:32,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1205285734, now seen corresponding path program 1 times [2021-11-25 18:37:32,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:32,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964502305] [2021-11-25 18:37:32,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:32,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:32,480 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:32,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964502305] [2021-11-25 18:37:32,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964502305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:37:32,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:37:32,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:37:32,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057192581] [2021-11-25 18:37:32,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:37:32,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:37:32,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:32,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:37:32,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:37:32,528 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-25 18:37:32,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:32,561 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2021-11-25 18:37:32,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:37:32,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-11-25 18:37:32,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:32,574 INFO L225 Difference]: With dead ends: 21 [2021-11-25 18:37:32,574 INFO L226 Difference]: Without dead ends: 10 [2021-11-25 18:37:32,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:37:32,591 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:32,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:37:32,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-25 18:37:32,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-25 18:37:32,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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) [2021-11-25 18:37:32,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-11-25 18:37:32,677 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-11-25 18:37:32,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:32,677 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-11-25 18:37:32,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-25 18:37:32,678 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-11-25 18:37:32,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:37:32,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:32,679 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:37:32,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:37:32,679 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:37:32,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:32,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1140391532, now seen corresponding path program 1 times [2021-11-25 18:37:32,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:32,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367397648] [2021-11-25 18:37:32,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:32,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:32,788 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:32,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367397648] [2021-11-25 18:37:32,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367397648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:37:32,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087139782] [2021-11-25 18:37:32,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:32,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:32,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:32,803 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:32,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:37:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:32,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:37:32,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:33,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:37:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:33,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087139782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:37:33,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [548366404] [2021-11-25 18:37:33,127 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:37:33,128 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:37:33,139 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:37:33,149 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:37:33,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:37:33,524 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:37:33,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [548366404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:37:33,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:37:33,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3, 3] total 9 [2021-11-25 18:37:33,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370809675] [2021-11-25 18:37:33,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:37:33,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:37:33,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:33,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:37:33,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:37:33,609 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 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) [2021-11-25 18:37:33,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:33,639 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-11-25 18:37:33,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:37:33,640 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 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 [2021-11-25 18:37:33,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:33,641 INFO L225 Difference]: With dead ends: 14 [2021-11-25 18:37:33,641 INFO L226 Difference]: Without dead ends: 10 [2021-11-25 18:37:33,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:37:33,644 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:33,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 16 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:37:33,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-25 18:37:33,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-25 18:37:33,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2021-11-25 18:37:33,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-25 18:37:33,650 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2021-11-25 18:37:33,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:33,651 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-25 18:37:33,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 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) [2021-11-25 18:37:33,651 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-25 18:37:33,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:37:33,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:33,652 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:37:33,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:37:33,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:33,869 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:37:33,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:33,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1157402193, now seen corresponding path program 1 times [2021-11-25 18:37:33,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:33,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138006966] [2021-11-25 18:37:33,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:33,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:33,931 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:33,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138006966] [2021-11-25 18:37:33,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138006966] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:37:33,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277911349] [2021-11-25 18:37:33,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:33,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:33,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:33,934 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:33,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:37:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:33,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:37:33,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:34,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:37:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:34,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277911349] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:37:34,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [241241689] [2021-11-25 18:37:34,075 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:37:34,076 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:37:34,076 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:37:34,077 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:37:34,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:37:34,362 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:37:34,472 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '193#(and (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 0) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 100 |ULTIMATE.start_main_~main__i~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:37:34,472 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:37:34,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:37:34,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-25 18:37:34,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812564230] [2021-11-25 18:37:34,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:37:34,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:37:34,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:34,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:37:34,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:37:34,475 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-11-25 18:37:34,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:34,494 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-11-25 18:37:34,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:37:34,495 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 [2021-11-25 18:37:34,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:34,496 INFO L225 Difference]: With dead ends: 20 [2021-11-25 18:37:34,496 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 18:37:34,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:37:34,498 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:34,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:37:34,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 18:37:34,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-25 18:37:34,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:37:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-25 18:37:34,511 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2021-11-25 18:37:34,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:34,511 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-25 18:37:34,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-11-25 18:37:34,512 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-25 18:37:34,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:37:34,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:34,513 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:37:34,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 18:37:34,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:34,729 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:37:34,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:34,730 INFO L85 PathProgramCache]: Analyzing trace with hash 678974667, now seen corresponding path program 2 times [2021-11-25 18:37:34,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:34,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100356460] [2021-11-25 18:37:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:34,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:34,823 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:34,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100356460] [2021-11-25 18:37:34,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100356460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:37:34,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516516371] [2021-11-25 18:37:34,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:37:34,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:34,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:34,825 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:34,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:37:34,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:37:34,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:37:34,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:37:34,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:34,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:37:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:35,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516516371] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:37:35,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [105784613] [2021-11-25 18:37:35,034 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:37:35,035 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:37:35,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:37:35,037 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:37:35,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:37:35,231 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:37:35,353 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '318#(and (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 0) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 100 |ULTIMATE.start_main_~main__i~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:37:35,353 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:37:35,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:37:35,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-25 18:37:35,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971472268] [2021-11-25 18:37:35,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:37:35,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:37:35,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:35,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:37:35,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:37:35,357 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 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) [2021-11-25 18:37:35,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:35,389 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2021-11-25 18:37:35,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:37:35,390 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 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 11 [2021-11-25 18:37:35,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:35,391 INFO L225 Difference]: With dead ends: 26 [2021-11-25 18:37:35,391 INFO L226 Difference]: Without dead ends: 19 [2021-11-25 18:37:35,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:37:35,393 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:35,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:37:35,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-25 18:37:35,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-25 18:37:35,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 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) [2021-11-25 18:37:35,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-25 18:37:35,400 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 11 [2021-11-25 18:37:35,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:35,401 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-25 18:37:35,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 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) [2021-11-25 18:37:35,401 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-25 18:37:35,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 18:37:35,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:35,402 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:37:35,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-25 18:37:35,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:35,629 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:37:35,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:35,629 INFO L85 PathProgramCache]: Analyzing trace with hash 203278091, now seen corresponding path program 3 times [2021-11-25 18:37:35,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:35,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050271776] [2021-11-25 18:37:35,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:35,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:35,875 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:35,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050271776] [2021-11-25 18:37:35,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050271776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:37:35,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554954237] [2021-11-25 18:37:35,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:37:35,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:35,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:35,878 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:35,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:37:35,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:37:35,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:37:35,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:37:35,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:36,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:37:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:36,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554954237] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:37:36,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1176790564] [2021-11-25 18:37:36,307 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:37:36,307 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:37:36,308 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:37:36,308 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:37:36,309 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:37:36,465 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:37:36,592 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '515#(and (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 0) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 100 |ULTIMATE.start_main_~main__i~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:37:36,592 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:37:36,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:37:36,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-25 18:37:36,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795464062] [2021-11-25 18:37:36,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:37:36,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 18:37:36,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:36,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 18:37:36,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=466, Unknown=0, NotChecked=0, Total=756 [2021-11-25 18:37:36,597 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 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) [2021-11-25 18:37:36,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:36,677 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2021-11-25 18:37:36,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 18:37:36,678 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 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 [2021-11-25 18:37:36,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:36,683 INFO L225 Difference]: With dead ends: 38 [2021-11-25 18:37:36,683 INFO L226 Difference]: Without dead ends: 31 [2021-11-25 18:37:36,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=466, Unknown=0, NotChecked=0, Total=756 [2021-11-25 18:37:36,688 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:36,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:37:36,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-25 18:37:36,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-25 18:37:36,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:37:36,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-11-25 18:37:36,701 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 17 [2021-11-25 18:37:36,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:36,701 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-11-25 18:37:36,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 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) [2021-11-25 18:37:36,702 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-11-25 18:37:36,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 18:37:36,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:36,704 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:37:36,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:37:36,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:36,925 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:37:36,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:36,925 INFO L85 PathProgramCache]: Analyzing trace with hash 767597451, now seen corresponding path program 4 times [2021-11-25 18:37:36,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:36,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541260300] [2021-11-25 18:37:36,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:36,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:37,439 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:37,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541260300] [2021-11-25 18:37:37,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541260300] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:37:37,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730112959] [2021-11-25 18:37:37,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:37:37,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:37,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:37,445 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:37,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:37:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:37,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 18:37:37,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:37,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:37:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:38,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730112959] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:37:38,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [697831841] [2021-11-25 18:37:38,693 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:37:38,694 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:37:38,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:37:38,694 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:37:38,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:37:38,823 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:37:38,969 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '856#(and (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 0) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 100 |ULTIMATE.start_main_~main__i~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:37:38,969 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:37:38,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:37:38,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-11-25 18:37:38,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088949255] [2021-11-25 18:37:38,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:37:38,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 18:37:38,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:38,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 18:37:38,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1142, Invalid=1510, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 18:37:38,974 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:37:39,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:39,084 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2021-11-25 18:37:39,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 18:37:39,086 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-25 18:37:39,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:39,088 INFO L225 Difference]: With dead ends: 62 [2021-11-25 18:37:39,088 INFO L226 Difference]: Without dead ends: 55 [2021-11-25 18:37:39,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1142, Invalid=1510, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 18:37:39,091 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:39,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:37:39,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-25 18:37:39,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-25 18:37:39,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 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) [2021-11-25 18:37:39,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-11-25 18:37:39,104 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 29 [2021-11-25 18:37:39,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:39,105 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-11-25 18:37:39,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:37:39,106 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-11-25 18:37:39,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 18:37:39,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:39,108 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:37:39,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:37:39,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:39,326 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:37:39,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:39,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1563032437, now seen corresponding path program 5 times [2021-11-25 18:37:39,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:39,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588052857] [2021-11-25 18:37:39,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:39,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:40,816 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:40,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588052857] [2021-11-25 18:37:40,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588052857] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:37:40,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353385548] [2021-11-25 18:37:40,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:37:40,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:40,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:40,821 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:40,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:37:40,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-25 18:37:40,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:37:40,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 18:37:40,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:41,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:37:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:44,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353385548] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:37:44,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1592000615] [2021-11-25 18:37:44,676 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:37:44,676 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:37:44,676 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:37:44,677 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:37:44,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:37:44,810 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:37:45,013 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1485#(and (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 0) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 100 |ULTIMATE.start_main_~main__i~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:37:45,013 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:37:45,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:37:45,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2021-11-25 18:37:45,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560018700] [2021-11-25 18:37:45,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:37:45,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-25 18:37:45,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:45,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-25 18:37:45,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4574, Invalid=5326, Unknown=0, NotChecked=0, Total=9900 [2021-11-25 18:37:45,029 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 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) [2021-11-25 18:37:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:45,260 INFO L93 Difference]: Finished difference Result 110 states and 159 transitions. [2021-11-25 18:37:45,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-25 18:37:45,261 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 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 53 [2021-11-25 18:37:45,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:45,262 INFO L225 Difference]: With dead ends: 110 [2021-11-25 18:37:45,263 INFO L226 Difference]: Without dead ends: 103 [2021-11-25 18:37:45,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4574, Invalid=5326, Unknown=0, NotChecked=0, Total=9900 [2021-11-25 18:37:45,270 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:45,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:37:45,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-25 18:37:45,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-11-25 18:37:45,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 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) [2021-11-25 18:37:45,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-11-25 18:37:45,290 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 53 [2021-11-25 18:37:45,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:45,291 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-11-25 18:37:45,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 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) [2021-11-25 18:37:45,292 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-11-25 18:37:45,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-25 18:37:45,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:45,296 INFO L514 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:37:45,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:37:45,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:45,513 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:37:45,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:45,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1077946741, now seen corresponding path program 6 times [2021-11-25 18:37:45,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:45,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579052657] [2021-11-25 18:37:45,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:45,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:49,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:49,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579052657] [2021-11-25 18:37:49,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579052657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:37:49,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139589427] [2021-11-25 18:37:49,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:37:49,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:49,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:49,553 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:49,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:37:49,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:37:49,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:37:49,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-25 18:37:49,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:50,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:37:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:50,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139589427] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:37:50,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1898833711] [2021-11-25 18:37:50,968 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:37:50,968 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:37:50,968 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:37:50,969 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:37:50,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:37:51,119 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:37:51,424 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2600#(and (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 0) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 100 |ULTIMATE.start_main_~main__i~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:37:51,427 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:37:51,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:37:51,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 101 [2021-11-25 18:37:51,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242697594] [2021-11-25 18:37:51,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:37:51,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-11-25 18:37:51,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:51,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-11-25 18:37:51,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5165, Invalid=5965, Unknown=0, NotChecked=0, Total=11130 [2021-11-25 18:37:51,435 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 102 states, 102 states have (on average 1.0588235294117647) internal successors, (108), 101 states have internal predecessors, (108), 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) [2021-11-25 18:37:51,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:51,633 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2021-11-25 18:37:51,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-25 18:37:51,634 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.0588235294117647) internal successors, (108), 101 states have internal predecessors, (108), 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 101 [2021-11-25 18:37:51,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:51,636 INFO L225 Difference]: With dead ends: 116 [2021-11-25 18:37:51,636 INFO L226 Difference]: Without dead ends: 109 [2021-11-25 18:37:51,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 291 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5165, Invalid=5965, Unknown=0, NotChecked=0, Total=11130 [2021-11-25 18:37:51,642 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:51,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:37:51,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-25 18:37:51,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-25 18:37:51,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 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) [2021-11-25 18:37:51,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-11-25 18:37:51,661 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 101 [2021-11-25 18:37:51,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:51,662 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-11-25 18:37:51,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.0588235294117647) internal successors, (108), 101 states have internal predecessors, (108), 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) [2021-11-25 18:37:51,662 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-11-25 18:37:51,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-25 18:37:51,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:51,665 INFO L514 BasicCegarLoop]: trace histogram [100, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:37:51,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:37:51,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:51,881 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:37:51,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:51,881 INFO L85 PathProgramCache]: Analyzing trace with hash -2102593333, now seen corresponding path program 7 times [2021-11-25 18:37:51,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:51,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804883428] [2021-11-25 18:37:51,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:51,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:37:51,964 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 18:37:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:37:52,104 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 18:37:52,104 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 18:37:52,106 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 18:37:52,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 18:37:52,112 INFO L732 BasicCegarLoop]: Path program histogram: [7, 1, 1] [2021-11-25 18:37:52,116 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 18:37:52,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:37:52 BoogieIcfgContainer [2021-11-25 18:37:52,269 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 18:37:52,270 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 18:37:52,270 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 18:37:52,270 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 18:37:52,271 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:37:32" (3/4) ... [2021-11-25 18:37:52,274 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 18:37:52,274 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 18:37:52,275 INFO L158 Benchmark]: Toolchain (without parser) took 20876.78ms. Allocated memory was 94.4MB in the beginning and 172.0MB in the end (delta: 77.6MB). Free memory was 55.3MB in the beginning and 128.6MB in the end (delta: -73.3MB). Peak memory consumption was 2.5MB. Max. memory is 16.1GB. [2021-11-25 18:37:52,276 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 94.4MB. Free memory was 71.7MB in the beginning and 71.6MB in the end (delta: 92.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:37:52,276 INFO L158 Benchmark]: CACSL2BoogieTranslator took 308.20ms. Allocated memory is still 94.4MB. Free memory was 55.1MB in the beginning and 70.5MB in the end (delta: -15.4MB). Peak memory consumption was 6.0MB. Max. memory is 16.1GB. [2021-11-25 18:37:52,277 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.81ms. Allocated memory is still 94.4MB. Free memory was 70.5MB in the beginning and 69.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:37:52,277 INFO L158 Benchmark]: Boogie Preprocessor took 41.01ms. Allocated memory is still 94.4MB. Free memory was 69.1MB in the beginning and 68.2MB in the end (delta: 966.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:37:52,278 INFO L158 Benchmark]: RCFGBuilder took 379.86ms. Allocated memory is still 94.4MB. Free memory was 68.2MB in the beginning and 59.0MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 18:37:52,278 INFO L158 Benchmark]: TraceAbstraction took 20079.69ms. Allocated memory was 94.4MB in the beginning and 172.0MB in the end (delta: 77.6MB). Free memory was 58.7MB in the beginning and 128.6MB in the end (delta: -69.9MB). Peak memory consumption was 72.8MB. Max. memory is 16.1GB. [2021-11-25 18:37:52,278 INFO L158 Benchmark]: Witness Printer took 4.74ms. Allocated memory is still 172.0MB. Free memory is still 128.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:37:52,281 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 94.4MB. Free memory was 71.7MB in the beginning and 71.6MB in the end (delta: 92.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 308.20ms. Allocated memory is still 94.4MB. Free memory was 55.1MB in the beginning and 70.5MB in the end (delta: -15.4MB). Peak memory consumption was 6.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.81ms. Allocated memory is still 94.4MB. Free memory was 70.5MB in the beginning and 69.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.01ms. Allocated memory is still 94.4MB. Free memory was 69.1MB in the beginning and 68.2MB in the end (delta: 966.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 379.86ms. Allocated memory is still 94.4MB. Free memory was 68.2MB in the beginning and 59.0MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 20079.69ms. Allocated memory was 94.4MB in the beginning and 172.0MB in the end (delta: 77.6MB). Free memory was 58.7MB in the beginning and 128.6MB in the end (delta: -69.9MB). Peak memory consumption was 72.8MB. Max. memory is 16.1GB. * Witness Printer took 4.74ms. Allocated memory is still 172.0MB. Free memory is still 128.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 41]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 28, overapproximation of someBinaryArithmeticDOUBLEoperation at line 19. Possible FailurePath: [L1] int __return_main; [L9] double main__x0; [L10] double main__x1; [L11] double main__x2; [L12] int main__i; [L13] main__x0 = 5.5 [L14] main__x1 = 5.545454545454546 [L15] main__i = 0 VAL [__return_main=0, main__i=0, main__x0=11/2, main__x1=2772727272727273/500000000000000] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=1, main__x0=2772727272727273/500000000000000, main__x1=149, main__x2=149] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=2, main__x0=149, main__x1=139, main__x2=139] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=3, main__x0=139, main__x1=113, main__x2=113] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=4, main__x0=113, main__x1=111, main__x2=111] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=5, main__x0=111, main__x1=106, main__x2=106] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=6, main__x0=106, main__x1=164, main__x2=164] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=7, main__x0=164, main__x1=194, main__x2=194] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=8, main__x0=194, main__x1=176, main__x2=176] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=9, main__x0=176, main__x1=151, main__x2=151] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=10, main__x0=151, main__x1=114, main__x2=114] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=11, main__x0=114, main__x1=131, main__x2=131] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=12, main__x0=131, main__x1=141, main__x2=141] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=13, main__x0=141, main__x1=158, main__x2=158] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=14, main__x0=158, main__x1=178, main__x2=178] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=15, main__x0=178, main__x1=105, main__x2=105] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=16, main__x0=105, main__x1=154, main__x2=154] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=17, main__x0=154, main__x1=153, main__x2=153] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=18, main__x0=153, main__x1=134, main__x2=134] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=19, main__x0=134, main__x1=132, main__x2=132] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=20, main__x0=132, main__x1=152, main__x2=152] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=21, main__x0=152, main__x1=136, main__x2=136] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=22, main__x0=136, main__x1=120, main__x2=120] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=23, main__x0=120, main__x1=124, main__x2=124] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=24, main__x0=124, main__x1=192, main__x2=192] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=25, main__x0=192, main__x1=140, main__x2=140] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=26, main__x0=140, main__x1=115, main__x2=115] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=27, main__x0=115, main__x1=104, main__x2=104] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=28, main__x0=104, main__x1=107, main__x2=107] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=29, main__x0=107, main__x1=191, main__x2=191] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=30, main__x0=191, main__x1=172, main__x2=172] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=31, main__x0=172, main__x1=142, main__x2=142] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=32, main__x0=142, main__x1=183, main__x2=183] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=33, main__x0=183, main__x1=168, main__x2=168] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=34, main__x0=168, main__x1=165, main__x2=165] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=35, main__x0=165, main__x1=135, main__x2=135] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=36, main__x0=135, main__x1=116, main__x2=116] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=37, main__x0=116, main__x1=181, main__x2=181] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=38, main__x0=181, main__x1=188, main__x2=188] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=39, main__x0=188, main__x1=193, main__x2=193] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=40, main__x0=193, main__x1=156, main__x2=156] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=41, main__x0=156, main__x1=112, main__x2=112] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=42, main__x0=112, main__x1=175, main__x2=175] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=43, main__x0=175, main__x1=159, main__x2=159] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=44, main__x0=159, main__x1=144, main__x2=144] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=45, main__x0=144, main__x1=195, main__x2=195] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=46, main__x0=195, main__x1=102, main__x2=102] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=47, main__x0=102, main__x1=157, main__x2=157] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=48, main__x0=157, main__x1=185, main__x2=185] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=49, main__x0=185, main__x1=121, main__x2=121] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=50, main__x0=121, main__x1=184, main__x2=184] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=51, main__x0=184, main__x1=119, main__x2=119] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=52, main__x0=119, main__x1=126, main__x2=126] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=53, main__x0=126, main__x1=177, main__x2=177] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=54, main__x0=177, main__x1=117, main__x2=117] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=55, main__x0=117, main__x1=162, main__x2=162] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=56, main__x0=162, main__x1=187, main__x2=187] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=57, main__x0=187, main__x1=169, main__x2=169] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=58, main__x0=169, main__x1=147, main__x2=147] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=59, main__x0=147, main__x1=148, main__x2=148] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=60, main__x0=148, main__x1=150, main__x2=150] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=61, main__x0=150, main__x1=167, main__x2=167] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=62, main__x0=167, main__x1=170, main__x2=170] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=63, main__x0=170, main__x1=180, main__x2=180] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=64, main__x0=180, main__x1=123, main__x2=123] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=65, main__x0=123, main__x1=186, main__x2=186] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=66, main__x0=186, main__x1=108, main__x2=108] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=67, main__x0=108, main__x1=189, main__x2=189] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=68, main__x0=189, main__x1=122, main__x2=122] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=69, main__x0=122, main__x1=179, main__x2=179] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=70, main__x0=179, main__x1=103, main__x2=103] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=71, main__x0=103, main__x1=190, main__x2=190] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=72, main__x0=190, main__x1=196, main__x2=196] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=73, main__x0=196, main__x1=166, main__x2=166] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=74, main__x0=166, main__x1=138, main__x2=138] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=75, main__x0=138, main__x1=143, main__x2=143] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=76, main__x0=143, main__x1=145, main__x2=145] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=77, main__x0=145, main__x1=129, main__x2=129] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=78, main__x0=129, main__x1=197, main__x2=197] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=79, main__x0=197, main__x1=198, main__x2=198] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=80, main__x0=198, main__x1=182, main__x2=182] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=81, main__x0=182, main__x1=171, main__x2=171] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=82, main__x0=171, main__x1=163, main__x2=163] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=83, main__x0=163, main__x1=130, main__x2=130] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=84, main__x0=130, main__x1=160, main__x2=160] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=85, main__x0=160, main__x1=161, main__x2=161] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=86, main__x0=161, main__x1=174, main__x2=174] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=87, main__x0=174, main__x1=127, main__x2=127] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=88, main__x0=127, main__x1=110, main__x2=110] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=89, main__x0=110, main__x1=109, main__x2=109] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=90, main__x0=109, main__x1=118, main__x2=118] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=91, main__x0=118, main__x1=128, main__x2=128] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=92, main__x0=128, main__x1=173, main__x2=173] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=93, main__x0=173, main__x1=137, main__x2=137] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=94, main__x0=137, main__x1=101, main__x2=101] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=95, main__x0=101, main__x1=146, main__x2=146] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=96, main__x0=146, main__x1=200, main__x2=200] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=97, main__x0=200, main__x1=155, main__x2=155] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=98, main__x0=155, main__x1=125, main__x2=125] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=99, main__x0=125, main__x1=133, main__x2=133] [L17] COND TRUE main__i < 100 [L19] main__x2 = 111.0 - ((1130.0 - (3000.0 / main__x0)) / main__x1) [L20] main__x0 = main__x1 [L21] main__x1 = main__x2 [L22] main__i = main__i + 1 VAL [__return_main=0, main__i=100, main__x0=133, main__x1=199, main__x2=199] [L17] COND FALSE !(main__i < 100) [L27] int main____CPAchecker_TMP_0; VAL [__return_main=0, main__i=100, main__x0=133, main__x1=199, main__x2=199] [L28] COND FALSE !(main__x0 >= 99.0) VAL [__return_main=0, main__i=100, main__x0=133, main__x1=199, main__x2=199] [L53] main____CPAchecker_TMP_0 = 0 VAL [__return_main=0, main____CPAchecker_TMP_0=0, main__i=100, main__x0=133, main__x1=199, main__x2=199] [L35] int __tmp_1; [L36] __tmp_1 = main____CPAchecker_TMP_0 [L37] int __VERIFIER_assert__cond; [L38] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=0, main__i=100, main__x0=133, main__x1=199, main__x2=199] [L39] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=0, main__i=100, main__x0=133, main__x1=199, main__x2=199] [L41] reach_error() VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=0, main__i=100, main__x0=133, main__x1=199, main__x2=199] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 19.9s, OverallIterations: 9, TraceHistogramMax: 100, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 17 mSDsluCounter, 286 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 222 mSDsCounter, 111 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 341 IncrementalHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 111 mSolverCounterUnsat, 65 mSDtfsCounter, 341 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 861 GetRequests, 545 SyntacticMatches, 7 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1824 ImplicationChecksByTransitivity, 11.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=8, InterpolantAutomatonStates: 297, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 13.0s InterpolantComputationTime, 568 NumberOfCodeBlocks, 568 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 666 ConstructedInterpolants, 0 QuantifiedInterpolants, 1778 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1555 ConjunctsInSsa, 192 ConjunctsInUnsatCore, 22 InterpolantComputations, 1 PerfectInterpolantSequences, 0/17598 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 7, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME: 0.2s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 9, TOOLS_QUANTIFIERELIM_TIME: 0.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 23, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 7, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 0.3s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.3s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 51, DAG_COMPRESSION_RETAINED_NODES: 22, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-25 18:37:52,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0209c9293388eb915387172d6fa3be69dfb35a1de5258b69ac610130c33e2610 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:37:55,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:37:55,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:37:55,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:37:55,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:37:55,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:37:55,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:37:55,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:37:55,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:37:55,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:37:55,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:37:55,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:37:55,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:37:55,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:37:55,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:37:55,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:37:55,243 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:37:55,244 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:37:55,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:37:55,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:37:55,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:37:55,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:37:55,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:37:55,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:37:55,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:37:55,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:37:55,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:37:55,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:37:55,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:37:55,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:37:55,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:37:55,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:37:55,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:37:55,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:37:55,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:37:55,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:37:55,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:37:55,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:37:55,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:37:55,315 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:37:55,316 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:37:55,322 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-25 18:37:55,375 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:37:55,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:37:55,377 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:37:55,377 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:37:55,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:37:55,378 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:37:55,379 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:37:55,379 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:37:55,379 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:37:55,380 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:37:55,381 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:37:55,381 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:37:55,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:37:55,384 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:37:55,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:37:55,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:37:55,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:37:55,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:37:55,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:37:55,385 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:37:55,386 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 18:37:55,386 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 18:37:55,386 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:37:55,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:37:55,387 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:37:55,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:37:55,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:37:55,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 18:37:55,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:37:55,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:37:55,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:37:55,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:37:55,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:37:55,390 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 18:37:55,391 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 18:37:55,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:37:55,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:37:55,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:37:55,392 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0209c9293388eb915387172d6fa3be69dfb35a1de5258b69ac610130c33e2610 [2021-11-25 18:37:55,852 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:37:55,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:37:55,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:37:55,892 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:37:55,893 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:37:55,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c [2021-11-25 18:37:55,984 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/data/7e4c715b4/63384ee1fc164cbc9e9b63fca190a30e/FLAG44477b386 [2021-11-25 18:37:56,513 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:37:56,514 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c [2021-11-25 18:37:56,522 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/data/7e4c715b4/63384ee1fc164cbc9e9b63fca190a30e/FLAG44477b386 [2021-11-25 18:37:56,865 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/data/7e4c715b4/63384ee1fc164cbc9e9b63fca190a30e [2021-11-25 18:37:56,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:37:56,872 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:37:56,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:37:56,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:37:56,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:37:56,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:37:56" (1/1) ... [2021-11-25 18:37:56,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1570571e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:56, skipping insertion in model container [2021-11-25 18:37:56,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:37:56" (1/1) ... [2021-11-25 18:37:56,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:37:56,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:37:57,161 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_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c[964,977] [2021-11-25 18:37:57,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:37:57,189 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:37:57,207 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_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c[964,977] [2021-11-25 18:37:57,209 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:37:57,224 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:37:57,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:57 WrapperNode [2021-11-25 18:37:57,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:37:57,226 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:37:57,226 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:37:57,226 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:37:57,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:57" (1/1) ... [2021-11-25 18:37:57,252 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:57" (1/1) ... [2021-11-25 18:37:57,287 INFO L137 Inliner]: procedures = 13, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2021-11-25 18:37:57,288 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:37:57,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:37:57,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:37:57,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:37:57,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:57" (1/1) ... [2021-11-25 18:37:57,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:57" (1/1) ... [2021-11-25 18:37:57,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:57" (1/1) ... [2021-11-25 18:37:57,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:57" (1/1) ... [2021-11-25 18:37:57,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:57" (1/1) ... [2021-11-25 18:37:57,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:57" (1/1) ... [2021-11-25 18:37:57,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:57" (1/1) ... [2021-11-25 18:37:57,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:37:57,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:37:57,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:37:57,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:37:57,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:57" (1/1) ... [2021-11-25 18:37:57,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:37:57,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:57,391 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:37:57,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:37:57,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:37:57,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:37:57,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:37:57,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 18:37:57,527 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:37:57,529 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:38:00,302 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:38:00,309 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:38:00,309 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 18:38:00,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:38:00 BoogieIcfgContainer [2021-11-25 18:38:00,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:38:00,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:38:00,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:38:00,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:38:00,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:37:56" (1/3) ... [2021-11-25 18:38:00,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749ab362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:38:00, skipping insertion in model container [2021-11-25 18:38:00,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:57" (2/3) ... [2021-11-25 18:38:00,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749ab362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:38:00, skipping insertion in model container [2021-11-25 18:38:00,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:38:00" (3/3) ... [2021-11-25 18:38:00,322 INFO L111 eAbstractionObserver]: Analyzing ICFG Muller_Kahan.c.p+cfa-reducer.c [2021-11-25 18:38:00,328 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:38:00,328 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:38:00,410 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:38:00,433 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=FINITE_AUTOMATA, 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 [2021-11-25 18:38:00,434 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:38:00,462 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2021-11-25 18:38:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:38:00,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:00,469 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:38:00,470 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:38:00,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:00,477 INFO L85 PathProgramCache]: Analyzing trace with hash 207177897, now seen corresponding path program 1 times [2021-11-25 18:38:00,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:38:00,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750935357] [2021-11-25 18:38:00,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:00,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:38:00,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:38:00,503 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:38:00,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 18:38:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:00,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:38:00,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:00,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:38:00,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:38:00,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750935357] [2021-11-25 18:38:00,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750935357] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:00,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:38:00,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:38:00,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002837208] [2021-11-25 18:38:00,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:00,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:38:00,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:38:00,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:38:00,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:38:00,815 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-11-25 18:38:04,404 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.57s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:38:04,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:04,806 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-11-25 18:38:04,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:38:04,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 [2021-11-25 18:38:04,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:04,818 INFO L225 Difference]: With dead ends: 24 [2021-11-25 18:38:04,819 INFO L226 Difference]: Without dead ends: 11 [2021-11-25 18:38:04,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:38:04,826 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:04,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2021-11-25 18:38:04,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-25 18:38:04,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-25 18:38:04,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:04,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-25 18:38:04,866 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-11-25 18:38:04,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:04,867 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-25 18:38:04,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-11-25 18:38:04,868 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-25 18:38:04,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:38:04,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:04,869 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:38:04,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:05,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:38:05,088 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:38:05,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:05,090 INFO L85 PathProgramCache]: Analyzing trace with hash 263819657, now seen corresponding path program 1 times [2021-11-25 18:38:05,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:38:05,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738084477] [2021-11-25 18:38:05,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:05,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:38:05,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:38:05,101 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:38:05,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 18:38:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:07,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:38:07,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:07,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:07,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:38:07,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738084477] [2021-11-25 18:38:07,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738084477] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:07,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [92868767] [2021-11-25 18:38:07,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:07,700 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:38:07,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:38:07,712 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:38:07,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-25 18:38:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:07,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:38:07,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:38:08,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:38:08,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [92868767] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:08,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:38:08,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2021-11-25 18:38:08,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883695645] [2021-11-25 18:38:08,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:08,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:38:08,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:38:08,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:38:08,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:38:08,316 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-11-25 18:38:08,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:08,524 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-11-25 18:38:08,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:38:08,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2021-11-25 18:38:08,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:08,526 INFO L225 Difference]: With dead ends: 15 [2021-11-25 18:38:08,526 INFO L226 Difference]: Without dead ends: 11 [2021-11-25 18:38:08,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:38:08,529 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:08,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:38:08,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-25 18:38:08,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-25 18:38:08,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 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) [2021-11-25 18:38:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-25 18:38:08,535 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-11-25 18:38:08,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:08,536 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-25 18:38:08,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-11-25 18:38:08,536 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-25 18:38:08,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:38:08,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:08,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:38:08,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-25 18:38:08,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:08,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 18:38:08,941 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:38:08,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:08,942 INFO L85 PathProgramCache]: Analyzing trace with hash 280830318, now seen corresponding path program 1 times [2021-11-25 18:38:08,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:38:08,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010328778] [2021-11-25 18:38:08,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:08,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:38:08,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:38:08,945 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:38:08,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 18:38:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:11,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:38:11,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:11,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:11,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:38:11,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010328778] [2021-11-25 18:38:11,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010328778] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:11,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1927175086] [2021-11-25 18:38:11,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:11,463 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:38:11,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:38:11,467 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:38:11,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-25 18:38:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:13,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:38:13,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:13,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:13,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1927175086] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:13,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330088884] [2021-11-25 18:38:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:13,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:13,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:38:13,997 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:38:13,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:38:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:16,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:38:16,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:16,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:16,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330088884] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:16,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:38:16,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-25 18:38:16,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396936043] [2021-11-25 18:38:16,427 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:38:16,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:38:16,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:38:16,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:38:16,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:38:16,429 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-11-25 18:38:19,797 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.35s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:38:21,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:38:22,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:22,305 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-11-25 18:38:22,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:38:22,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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 9 [2021-11-25 18:38:22,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:22,307 INFO L225 Difference]: With dead ends: 20 [2021-11-25 18:38:22,307 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 18:38:22,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:38:22,310 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:22,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2021-11-25 18:38:22,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 18:38:22,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-25 18:38:22,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:22,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-25 18:38:22,317 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-11-25 18:38:22,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:22,317 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-25 18:38:22,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-11-25 18:38:22,318 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-25 18:38:22,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:38:22,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:22,319 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:38:22,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:22,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:22,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:22,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:38:22,925 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:38:22,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:22,926 INFO L85 PathProgramCache]: Analyzing trace with hash 634881390, now seen corresponding path program 2 times [2021-11-25 18:38:22,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:38:22,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051816079] [2021-11-25 18:38:22,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:38:22,927 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:38:22,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:38:22,928 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:38:22,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 18:38:28,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:38:28,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:38:29,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:38:29,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:29,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:30,177 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:38:30,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051816079] [2021-11-25 18:38:30,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051816079] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:30,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1926940000] [2021-11-25 18:38:30,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:38:30,179 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:38:30,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:38:30,197 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:38:30,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-25 18:38:37,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:38:37,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:38:37,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:38:37,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:37,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:37,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1926940000] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:37,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529061664] [2021-11-25 18:38:37,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:38:37,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:37,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:38:37,886 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:38:37,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:38:44,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:38:44,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:38:44,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:38:44,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:44,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:45,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529061664] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:45,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:38:45,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2021-11-25 18:38:45,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176884485] [2021-11-25 18:38:45,584 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:38:45,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 18:38:45,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:38:45,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 18:38:45,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:38:45,590 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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) [2021-11-25 18:38:49,081 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.46s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:38:51,100 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:38:53,111 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:38:55,115 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:38:56,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:56,460 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2021-11-25 18:38:56,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:38:56,460 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 18:38:56,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:56,461 INFO L225 Difference]: With dead ends: 24 [2021-11-25 18:38:56,461 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 18:38:56,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:38:56,463 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 8 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:56,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 42 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 7 Invalid, 4 Unknown, 0 Unchecked, 9.6s Time] [2021-11-25 18:38:56,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 18:38:56,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-25 18:38:56,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:56,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-25 18:38:56,471 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2021-11-25 18:38:56,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:56,471 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-25 18:38:56,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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) [2021-11-25 18:38:56,472 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-25 18:38:56,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:38:56,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:56,472 INFO L514 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:38:56,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:56,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:57,077 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forcibly destroying the process [2021-11-25 18:38:57,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 137 [2021-11-25 18:38:57,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:57,141 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:38:57,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:57,142 INFO L85 PathProgramCache]: Analyzing trace with hash -684634770, now seen corresponding path program 3 times [2021-11-25 18:38:57,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:38:57,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542983077] [2021-11-25 18:38:57,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:38:57,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:38:57,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:38:57,144 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:38:57,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 18:39:30,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 18:39:30,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:39:31,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:39:31,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:39:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:39:32,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:39:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:39:33,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:39:33,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542983077] [2021-11-25 18:39:33,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542983077] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:39:33,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [437172953] [2021-11-25 18:39:33,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:39:33,890 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:39:33,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:39:33,891 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:39:33,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-25 18:40:52,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 18:40:52,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:40:52,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:40:52,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:40:52,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:40:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:40:55,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [437172953] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:40:55,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311962908] [2021-11-25 18:40:55,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:40:55,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:55,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:55,277 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:55,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ea0a3f-5202-48f6-ad67-ebc6c2f88142/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process