./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array20_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array20_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh --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 4595fcce7ed27c87f4b36557925b67d85fd0fff83d482c199564b06ae0d3b884 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 08:36:41,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:36:41,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:36:41,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:36:41,757 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:36:41,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:36:41,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:36:41,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:36:41,761 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:36:41,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:36:41,762 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:36:41,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:36:41,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:36:41,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:36:41,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:36:41,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:36:41,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:36:41,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:36:41,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:36:41,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:36:41,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:36:41,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:36:41,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:36:41,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:36:41,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:36:41,775 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:36:41,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:36:41,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:36:41,776 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:36:41,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:36:41,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:36:41,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:36:41,778 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:36:41,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:36:41,779 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:36:41,780 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:36:41,780 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:36:41,780 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:36:41,781 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:36:41,781 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:36:41,782 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:36:41,782 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:36:41,802 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:36:41,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:36:41,802 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:36:41,802 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:36:41,803 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:36:41,803 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:36:41,803 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:36:41,803 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:36:41,803 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:36:41,803 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:36:41,804 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:36:41,804 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:36:41,804 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:36:41,804 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:36:41,804 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:36:41,804 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:36:41,804 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:36:41,804 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:36:41,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:36:41,805 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:36:41,805 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:36:41,805 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:36:41,805 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:36:41,805 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:36:41,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:36:41,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:36:41,806 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:36:41,806 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:36:41,806 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:36:41,806 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:36:41,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:36:41,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:36:41,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:36:41,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:36:41,807 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:36:41,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:36:41,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:36:41,807 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:36:41,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:36:41,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:36:41,807 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:36:41,808 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4595fcce7ed27c87f4b36557925b67d85fd0fff83d482c199564b06ae0d3b884 [2022-12-14 08:36:41,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:36:42,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:36:42,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:36:42,005 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:36:42,006 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:36:42,006 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-patterns/array20_pattern.c [2022-12-14 08:36:44,521 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:36:44,679 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:36:44,680 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/sv-benchmarks/c/array-patterns/array20_pattern.c [2022-12-14 08:36:44,684 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/data/e8ec0177a/34706c91a3c2432c85aa6e1e065ed613/FLAG60c46c70b [2022-12-14 08:36:44,694 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/data/e8ec0177a/34706c91a3c2432c85aa6e1e065ed613 [2022-12-14 08:36:44,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:36:44,697 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:36:44,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:36:44,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:36:44,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:36:44,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:44,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15c06b43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44, skipping insertion in model container [2022-12-14 08:36:44,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:44,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:36:44,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:36:44,833 WARN L237 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_f83cf2e7-5871-49dc-a5ab-879db757d577/sv-benchmarks/c/array-patterns/array20_pattern.c[1444,1457] [2022-12-14 08:36:44,852 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:36:44,860 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:36:44,871 WARN L237 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_f83cf2e7-5871-49dc-a5ab-879db757d577/sv-benchmarks/c/array-patterns/array20_pattern.c[1444,1457] [2022-12-14 08:36:44,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:36:44,890 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:36:44,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44 WrapperNode [2022-12-14 08:36:44,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:36:44,891 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:36:44,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:36:44,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:36:44,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:44,901 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:44,916 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2022-12-14 08:36:44,917 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:36:44,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:36:44,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:36:44,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:36:44,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:44,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:44,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:44,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:44,931 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:44,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:44,934 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:44,935 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:44,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:36:44,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:36:44,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:36:44,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:36:44,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (1/1) ... [2022-12-14 08:36:44,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:36:44,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:36:44,962 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:36:44,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:36:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:36:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 08:36:44,992 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 08:36:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:36:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 08:36:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 08:36:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:36:44,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:36:44,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 08:36:44,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 08:36:45,046 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:36:45,048 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:36:45,177 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:36:45,273 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:36:45,273 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-14 08:36:45,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:36:45 BoogieIcfgContainer [2022-12-14 08:36:45,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:36:45,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:36:45,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:36:45,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:36:45,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:36:44" (1/3) ... [2022-12-14 08:36:45,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433e6012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:36:45, skipping insertion in model container [2022-12-14 08:36:45,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:36:44" (2/3) ... [2022-12-14 08:36:45,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433e6012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:36:45, skipping insertion in model container [2022-12-14 08:36:45,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:36:45" (3/3) ... [2022-12-14 08:36:45,284 INFO L112 eAbstractionObserver]: Analyzing ICFG array20_pattern.c [2022-12-14 08:36:45,300 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:36:45,300 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:36:45,337 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:36:45,342 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@40fa93e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:36:45,342 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:36:45,345 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 08:36:45,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 08:36:45,352 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:36:45,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:36:45,353 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:36:45,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:36:45,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1984863423, now seen corresponding path program 1 times [2022-12-14 08:36:45,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:36:45,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191642802] [2022-12-14 08:36:45,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:36:45,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:36:45,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:36:45,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658926834] [2022-12-14 08:36:45,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:36:45,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:36:45,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:36:45,464 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:36:45,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:36:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:36:45,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 08:36:45,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:36:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:36:45,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:36:45,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:36:45,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191642802] [2022-12-14 08:36:45,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:36:45,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658926834] [2022-12-14 08:36:45,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658926834] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:36:45,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:36:45,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:36:45,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463964695] [2022-12-14 08:36:45,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:36:45,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 08:36:45,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:36:45,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 08:36:45,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 08:36:45,585 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 08:36:45,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:36:45,622 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2022-12-14 08:36:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 08:36:45,632 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-12-14 08:36:45,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:36:45,640 INFO L225 Difference]: With dead ends: 28 [2022-12-14 08:36:45,640 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 08:36:45,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 08:36:45,646 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:36:45,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:36:45,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 08:36:45,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-14 08:36:45,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 08:36:45,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-12-14 08:36:45,683 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 11 [2022-12-14 08:36:45,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:36:45,684 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-12-14 08:36:45,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 08:36:45,684 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2022-12-14 08:36:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 08:36:45,685 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:36:45,685 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:36:45,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:36:45,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:36:45,886 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:36:45,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:36:45,887 INFO L85 PathProgramCache]: Analyzing trace with hash -600046686, now seen corresponding path program 1 times [2022-12-14 08:36:45,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:36:45,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293564582] [2022-12-14 08:36:45,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:36:45,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:36:45,904 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:36:45,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647445637] [2022-12-14 08:36:45,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:36:45,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:36:45,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:36:45,906 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:36:45,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:36:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:36:45,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 08:36:45,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:36:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:36:46,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:36:46,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:36:46,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293564582] [2022-12-14 08:36:46,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:36:46,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647445637] [2022-12-14 08:36:46,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647445637] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:36:46,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:36:46,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:36:46,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098599117] [2022-12-14 08:36:46,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:36:46,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:36:46,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:36:46,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:36:46,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:36:46,024 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 08:36:46,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:36:46,060 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2022-12-14 08:36:46,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:36:46,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2022-12-14 08:36:46,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:36:46,062 INFO L225 Difference]: With dead ends: 23 [2022-12-14 08:36:46,062 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 08:36:46,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:36:46,064 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:36:46,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 36 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:36:46,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 08:36:46,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-14 08:36:46,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 08:36:46,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2022-12-14 08:36:46,071 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 19 [2022-12-14 08:36:46,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:36:46,072 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2022-12-14 08:36:46,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 08:36:46,072 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2022-12-14 08:36:46,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 08:36:46,073 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:36:46,073 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:36:46,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:36:46,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:36:46,275 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:36:46,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:36:46,278 INFO L85 PathProgramCache]: Analyzing trace with hash -2027418289, now seen corresponding path program 1 times [2022-12-14 08:36:46,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:36:46,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271703981] [2022-12-14 08:36:46,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:36:46,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:36:46,329 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:36:46,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754698436] [2022-12-14 08:36:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:36:46,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:36:46,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:36:46,333 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:36:46,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:36:46,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:36:46,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 08:36:46,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:36:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:36:46,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:36:46,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:36:46,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271703981] [2022-12-14 08:36:46,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:36:46,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754698436] [2022-12-14 08:36:46,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754698436] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:36:46,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:36:46,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:36:46,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368429997] [2022-12-14 08:36:46,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:36:46,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:36:46,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:36:46,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:36:46,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:36:46,458 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 08:36:46,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:36:46,524 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-12-14 08:36:46,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:36:46,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-12-14 08:36:46,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:36:46,525 INFO L225 Difference]: With dead ends: 41 [2022-12-14 08:36:46,525 INFO L226 Difference]: Without dead ends: 25 [2022-12-14 08:36:46,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:36:46,527 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:36:46,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 39 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:36:46,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-14 08:36:46,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2022-12-14 08:36:46,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 08:36:46,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2022-12-14 08:36:46,533 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 22 [2022-12-14 08:36:46,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:36:46,533 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2022-12-14 08:36:46,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 08:36:46,534 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2022-12-14 08:36:46,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 08:36:46,534 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:36:46,534 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:36:46,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:36:46,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:36:46,736 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:36:46,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:36:46,738 INFO L85 PathProgramCache]: Analyzing trace with hash 802022805, now seen corresponding path program 1 times [2022-12-14 08:36:46,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:36:46,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364242072] [2022-12-14 08:36:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:36:46,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:36:46,801 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:36:46,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118943593] [2022-12-14 08:36:46,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:36:46,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:36:46,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:36:46,807 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:36:46,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:36:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:36:46,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 08:36:46,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:36:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 08:36:46,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:36:46,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:36:46,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364242072] [2022-12-14 08:36:46,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:36:46,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118943593] [2022-12-14 08:36:46,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118943593] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:36:46,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:36:46,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:36:46,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838778841] [2022-12-14 08:36:46,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:36:46,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:36:46,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:36:46,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:36:46,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:36:46,956 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 08:36:47,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:36:47,003 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2022-12-14 08:36:47,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:36:47,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-12-14 08:36:47,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:36:47,004 INFO L225 Difference]: With dead ends: 40 [2022-12-14 08:36:47,004 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 08:36:47,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:36:47,006 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:36:47,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 29 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:36:47,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 08:36:47,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-12-14 08:36:47,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 08:36:47,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-12-14 08:36:47,012 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 24 [2022-12-14 08:36:47,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:36:47,012 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-12-14 08:36:47,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 08:36:47,012 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-12-14 08:36:47,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 08:36:47,013 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:36:47,013 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:36:47,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 08:36:47,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:36:47,214 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:36:47,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:36:47,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1481343850, now seen corresponding path program 1 times [2022-12-14 08:36:47,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:36:47,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567773406] [2022-12-14 08:36:47,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:36:47,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:36:47,229 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:36:47,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264811704] [2022-12-14 08:36:47,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:36:47,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:36:47,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:36:47,231 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:36:47,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83cf2e7-5871-49dc-a5ab-879db757d577/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:36:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:36:47,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-14 08:36:47,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:36:47,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:36:48,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1142 treesize of output 1099 [2022-12-14 08:36:58,697 WARN L233 SmtUtils]: Spent 10.42s on a formula simplification. DAG size of input: 570 DAG size of output: 74 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 08:36:58,698 INFO L321 Elim1Store]: treesize reduction 8129, result has 3.3 percent of original size [2022-12-14 08:36:58,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 8 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 108 case distinctions, treesize of input 1378 treesize of output 5741 [2022-12-14 08:37:01,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:37:01,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:37:01,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:37:01,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:01,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:01,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:37:01,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:37:01,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:01,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:01,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:37:01,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:01,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:37:01,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:01,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:01,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:37:01,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:37:01,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:37:01,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:01,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:02,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:02,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:02,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:02,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:02,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:03,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:03,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:03,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:03,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:03,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:03,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:37:03,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:37:03,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:03,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:03,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:03,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:37:03,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:03,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:37:03,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:03,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:37:03,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:04,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:37:04,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:37:04,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:37:04,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:04,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:04,166 INFO L217 Elim1Store]: Index analysis took 2579 ms [2022-12-14 08:37:04,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:04,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:04,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:04,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:04,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:04,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:37:04,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 11 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 2651 treesize of output 28790 [2022-12-14 08:37:29,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9095 treesize of output 9031