./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copyInit_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copyInit_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW --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 dba50526fe277b889497552d450811df3b306fd8692f19f5bf4d016bb218a94b --- 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-4e7fbc6 [2022-11-23 15:13:21,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:13:21,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:13:21,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:13:21,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:13:21,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:13:21,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:13:21,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:13:21,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:13:21,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:13:21,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:13:21,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:13:21,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:13:21,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:13:21,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:13:21,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:13:21,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:13:21,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:13:21,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:13:21,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:13:21,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:13:21,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:13:21,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:13:21,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:13:21,798 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:13:21,798 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:13:21,799 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:13:21,800 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:13:21,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:13:21,802 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:13:21,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:13:21,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:13:21,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:13:21,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:13:21,808 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:13:21,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:13:21,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:13:21,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:13:21,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:13:21,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:13:21,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:13:21,812 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:13:21,851 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:13:21,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:13:21,852 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:13:21,853 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:13:21,854 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:13:21,854 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:13:21,854 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:13:21,854 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:13:21,855 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:13:21,855 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:13:21,856 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:13:21,856 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:13:21,856 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:13:21,857 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:13:21,857 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:13:21,857 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:13:21,857 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:13:21,858 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:13:21,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:13:21,859 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:13:21,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:13:21,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:13:21,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:13:21,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:13:21,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:13:21,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:13:21,860 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:13:21,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:13:21,860 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:13:21,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:13:21,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:13:21,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:13:21,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:13:21,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:13:21,862 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:13:21,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:13:21,862 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:13:21,863 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:13:21,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:13:21,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:13:21,863 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:13:21,863 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_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dba50526fe277b889497552d450811df3b306fd8692f19f5bf4d016bb218a94b [2022-11-23 15:13:22,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:13:22,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:13:22,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:13:22,235 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:13:22,235 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:13:22,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-examples/standard_copyInit_ground.i [2022-11-23 15:13:25,246 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:13:25,525 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:13:25,526 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/sv-benchmarks/c/array-examples/standard_copyInit_ground.i [2022-11-23 15:13:25,532 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/data/19d398c46/a712588877fb421783761c97c53c41eb/FLAGd0e0e94b1 [2022-11-23 15:13:25,547 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/data/19d398c46/a712588877fb421783761c97c53c41eb [2022-11-23 15:13:25,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:13:25,552 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:13:25,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:13:25,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:13:25,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:13:25,558 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:13:25" (1/1) ... [2022-11-23 15:13:25,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fd3c209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:25, skipping insertion in model container [2022-11-23 15:13:25,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:13:25" (1/1) ... [2022-11-23 15:13:25,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:13:25,586 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:13:25,718 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_0b303b87-1317-4d78-81a3-2c521eef470b/sv-benchmarks/c/array-examples/standard_copyInit_ground.i[817,830] [2022-11-23 15:13:25,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:13:25,740 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:13:25,750 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_0b303b87-1317-4d78-81a3-2c521eef470b/sv-benchmarks/c/array-examples/standard_copyInit_ground.i[817,830] [2022-11-23 15:13:25,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:13:25,767 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:13:25,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:25 WrapperNode [2022-11-23 15:13:25,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:13:25,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:13:25,769 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:13:25,770 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:13:25,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:25" (1/1) ... [2022-11-23 15:13:25,785 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:25" (1/1) ... [2022-11-23 15:13:25,803 INFO L138 Inliner]: procedures = 15, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2022-11-23 15:13:25,803 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:13:25,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:13:25,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:13:25,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:13:25,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:25" (1/1) ... [2022-11-23 15:13:25,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:25" (1/1) ... [2022-11-23 15:13:25,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:25" (1/1) ... [2022-11-23 15:13:25,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:25" (1/1) ... [2022-11-23 15:13:25,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:25" (1/1) ... [2022-11-23 15:13:25,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:25" (1/1) ... [2022-11-23 15:13:25,824 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:25" (1/1) ... [2022-11-23 15:13:25,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:25" (1/1) ... [2022-11-23 15:13:25,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:13:25,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:13:25,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:13:25,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:13:25,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:25" (1/1) ... [2022-11-23 15:13:25,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:13:25,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:13:25,861 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:13:25,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:13:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:13:25,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:13:25,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:13:25,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:13:25,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:13:25,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:13:25,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:13:25,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:13:25,969 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:13:25,971 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:13:26,086 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:13:26,119 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:13:26,119 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 15:13:26,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:13:26 BoogieIcfgContainer [2022-11-23 15:13:26,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:13:26,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:13:26,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:13:26,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:13:26,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:13:25" (1/3) ... [2022-11-23 15:13:26,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22bca629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:13:26, skipping insertion in model container [2022-11-23 15:13:26,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:25" (2/3) ... [2022-11-23 15:13:26,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22bca629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:13:26, skipping insertion in model container [2022-11-23 15:13:26,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:13:26" (3/3) ... [2022-11-23 15:13:26,132 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copyInit_ground.i [2022-11-23 15:13:26,153 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:13:26,153 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:13:26,201 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:13:26,208 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;@7d2da63a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:13:26,208 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:13:26,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 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) [2022-11-23 15:13:26,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 15:13:26,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:13:26,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 15:13:26,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:13:26,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:13:26,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1658188629, now seen corresponding path program 1 times [2022-11-23 15:13:26,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:13:26,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577640977] [2022-11-23 15:13:26,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:13:26,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:13:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:13:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:13:26,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:13:26,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577640977] [2022-11-23 15:13:26,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577640977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:13:26,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:13:26,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:13:26,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645286677] [2022-11-23 15:13:26,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:13:26,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:13:26,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:13:26,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:13:26,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:13:26,540 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-11-23 15:13:26,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:13:26,587 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2022-11-23 15:13:26,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:13:26,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2022-11-23 15:13:26,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:13:26,606 INFO L225 Difference]: With dead ends: 18 [2022-11-23 15:13:26,608 INFO L226 Difference]: Without dead ends: 10 [2022-11-23 15:13:26,611 INFO L412 NwaCegarLoop]: 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 [2022-11-23 15:13:26,617 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:13:26,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:13:26,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-23 15:13:26,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-23 15:13:26,649 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) [2022-11-23 15:13:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-23 15:13:26,651 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2022-11-23 15:13:26,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:13:26,652 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-23 15:13:26,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-11-23 15:13:26,652 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-23 15:13:26,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 15:13:26,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:13:26,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:13:26,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:13:26,654 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:13:26,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:13:26,655 INFO L85 PathProgramCache]: Analyzing trace with hash 972767124, now seen corresponding path program 1 times [2022-11-23 15:13:26,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:13:26,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018745732] [2022-11-23 15:13:26,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:13:26,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:13:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:13:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:13:26,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:13:26,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018745732] [2022-11-23 15:13:26,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018745732] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:13:26,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955110634] [2022-11-23 15:13:26,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:13:26,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:13:26,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:13:26,838 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:13:26,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:13:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:13:26,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:13:26,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:13:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:13:27,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:13:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:13:27,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955110634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:13:27,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [122717455] [2022-11-23 15:13:27,168 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:13:27,168 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:13:27,172 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:13:27,178 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:13:27,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:13:27,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:27,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:27,345 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 15:13:27,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-23 15:13:27,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:27,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:27,456 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:13:27,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 15:13:27,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:27,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 15:13:27,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:27,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:27,679 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:13:27,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 238 treesize of output 235 [2022-11-23 15:13:27,817 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 16 treesize of output 12 [2022-11-23 15:13:27,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:27,884 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:13:27,885 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 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:13:27,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:27,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:27,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:27,970 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:13:27,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 85 [2022-11-23 15:13:28,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:28,073 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:13:28,074 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 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:13:28,104 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:13:28,260 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '104#(and (= (ite (= |ULTIMATE.start_main_#t~mem4#1| 42) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:13:28,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:13:28,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:13:28,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 15:13:28,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496019799] [2022-11-23 15:13:28,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:13:28,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:13:28,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:13:28,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:13:28,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:13:28,267 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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) [2022-11-23 15:13:28,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:13:28,320 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2022-11-23 15:13:28,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:13:28,321 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 15:13:28,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:13:28,321 INFO L225 Difference]: With dead ends: 23 [2022-11-23 15:13:28,321 INFO L226 Difference]: Without dead ends: 16 [2022-11-23 15:13:28,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:13:28,329 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:13:28,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:13:28,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-23 15:13:28,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-23 15:13:28,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 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) [2022-11-23 15:13:28,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-11-23 15:13:28,340 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-11-23 15:13:28,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:13:28,340 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-11-23 15:13:28,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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) [2022-11-23 15:13:28,341 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-11-23 15:13:28,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 15:13:28,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:13:28,341 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-11-23 15:13:28,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:13:28,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:13:28,548 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:13:28,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:13:28,548 INFO L85 PathProgramCache]: Analyzing trace with hash -2036733077, now seen corresponding path program 2 times [2022-11-23 15:13:28,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:13:28,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064498787] [2022-11-23 15:13:28,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:13:28,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:13:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:13:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:13:28,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:13:28,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064498787] [2022-11-23 15:13:28,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064498787] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:13:28,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461720533] [2022-11-23 15:13:28,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:13:28,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:13:28,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:13:28,744 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:13:28,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:13:28,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 15:13:28,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:13:28,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:13:28,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:13:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:13:28,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:13:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:13:28,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461720533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:13:28,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [830002308] [2022-11-23 15:13:28,924 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:13:28,924 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:13:28,924 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:13:28,925 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:13:28,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:13:28,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:28,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:28,981 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 15:13:28,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-23 15:13:29,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:29,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:29,048 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:13:29,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 15:13:29,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:29,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 15:13:29,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:29,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:29,236 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 15:13:29,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 233 treesize of output 236 [2022-11-23 15:13:29,372 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 16 treesize of output 12 [2022-11-23 15:13:29,400 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:13:29,401 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 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:13:29,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:29,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:29,512 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:13:29,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 89 [2022-11-23 15:13:29,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:29,608 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:13:29,609 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 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:13:29,621 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:13:29,749 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '263#(and (= (ite (= |ULTIMATE.start_main_#t~mem4#1| 42) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:13:29,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:13:29,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:13:29,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 15:13:29,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861420060] [2022-11-23 15:13:29,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:13:29,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 15:13:29,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:13:29,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 15:13:29,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:13:29,756 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:13:29,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:13:29,836 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2022-11-23 15:13:29,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:13:29,837 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 15:13:29,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:13:29,839 INFO L225 Difference]: With dead ends: 38 [2022-11-23 15:13:29,839 INFO L226 Difference]: Without dead ends: 28 [2022-11-23 15:13:29,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:13:29,850 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:13:29,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:13:29,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-23 15:13:29,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-23 15:13:29,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 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) [2022-11-23 15:13:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-11-23 15:13:29,859 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2022-11-23 15:13:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:13:29,859 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-11-23 15:13:29,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:13:29,860 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-11-23 15:13:29,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 15:13:29,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:13:29,861 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2022-11-23 15:13:29,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:13:30,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:13:30,073 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:13:30,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:13:30,073 INFO L85 PathProgramCache]: Analyzing trace with hash -523047541, now seen corresponding path program 3 times [2022-11-23 15:13:30,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:13:30,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178566751] [2022-11-23 15:13:30,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:13:30,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:13:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:13:30,446 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 15:13:30,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:13:30,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178566751] [2022-11-23 15:13:30,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178566751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:13:30,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428000386] [2022-11-23 15:13:30,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:13:30,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:13:30,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:13:30,448 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:13:30,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:13:30,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:13:30,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:13:30,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 15:13:30,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:13:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 15:13:30,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:13:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 15:13:30,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428000386] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:13:30,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2130456405] [2022-11-23 15:13:30,829 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:13:30,830 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:13:30,830 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:13:30,830 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:13:30,830 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:13:30,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:30,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:30,889 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:13:30,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 15:13:30,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:30,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:30,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-23 15:13:30,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:30,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 15:13:31,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:31,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:31,037 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:13:31,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 238 treesize of output 235 [2022-11-23 15:13:31,103 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 16 treesize of output 12 [2022-11-23 15:13:31,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:31,126 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:13:31,127 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 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:13:31,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:31,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:31,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:31,166 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:13:31,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 85 [2022-11-23 15:13:31,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:31,211 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:13:31,211 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 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:13:31,230 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:13:31,596 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '560#(and (= (ite (= |ULTIMATE.start_main_#t~mem4#1| 42) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:13:31,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:13:31,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:13:31,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-23 15:13:31,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478275978] [2022-11-23 15:13:31,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:13:31,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 15:13:31,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:13:31,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 15:13:31,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-11-23 15:13:31,599 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:13:31,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:13:31,726 INFO L93 Difference]: Finished difference Result 68 states and 95 transitions. [2022-11-23 15:13:31,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 15:13:31,727 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-23 15:13:31,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:13:31,728 INFO L225 Difference]: With dead ends: 68 [2022-11-23 15:13:31,728 INFO L226 Difference]: Without dead ends: 52 [2022-11-23 15:13:31,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-11-23 15:13:31,730 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:13:31,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:13:31,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-23 15:13:31,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-23 15:13:31,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 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) [2022-11-23 15:13:31,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-11-23 15:13:31,740 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 26 [2022-11-23 15:13:31,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:13:31,741 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-11-23 15:13:31,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:13:31,741 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-11-23 15:13:31,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-23 15:13:31,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:13:31,742 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2022-11-23 15:13:31,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:13:31,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-23 15:13:31,948 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:13:31,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:13:31,949 INFO L85 PathProgramCache]: Analyzing trace with hash -83723829, now seen corresponding path program 4 times [2022-11-23 15:13:31,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:13:31,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175154069] [2022-11-23 15:13:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:13:31,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:13:32,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:13:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 15:13:32,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:13:32,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175154069] [2022-11-23 15:13:32,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175154069] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:13:32,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597613163] [2022-11-23 15:13:32,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:13:32,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:13:32,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:13:32,756 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:13:32,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:13:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:13:32,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 15:13:32,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:13:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 15:13:32,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:13:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 15:13:33,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597613163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:13:33,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1972502576] [2022-11-23 15:13:33,803 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:13:33,803 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:13:33,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:13:33,803 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:13:33,803 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:13:33,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:33,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:33,851 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 15:13:33,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-23 15:13:33,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:33,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:33,904 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:13:33,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 15:13:33,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:33,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 15:13:34,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:34,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:34,030 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 15:13:34,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 233 treesize of output 236 [2022-11-23 15:13:34,083 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 16 treesize of output 12 [2022-11-23 15:13:34,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:34,104 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:13:34,104 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 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:13:34,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:13:34,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:34,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:34,136 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:13:34,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 85 [2022-11-23 15:13:34,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:13:34,175 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:13:34,175 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 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:13:34,190 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:13:34,965 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1133#(and (= (ite (= |ULTIMATE.start_main_#t~mem4#1| 42) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:13:34,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:13:34,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:13:34,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-23 15:13:34,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851730029] [2022-11-23 15:13:34,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:13:34,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-23 15:13:34,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:13:34,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-23 15:13:34,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 15:13:34,968 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 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) [2022-11-23 15:13:35,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:13:35,323 INFO L93 Difference]: Finished difference Result 128 states and 179 transitions. [2022-11-23 15:13:35,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-23 15:13:35,324 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 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 50 [2022-11-23 15:13:35,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:13:35,328 INFO L225 Difference]: With dead ends: 128 [2022-11-23 15:13:35,329 INFO L226 Difference]: Without dead ends: 100 [2022-11-23 15:13:35,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 98 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1951 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 15:13:35,331 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:13:35,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:13:35,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-23 15:13:35,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-11-23 15:13:35,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 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) [2022-11-23 15:13:35,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-11-23 15:13:35,351 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 50 [2022-11-23 15:13:35,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:13:35,351 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-11-23 15:13:35,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 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) [2022-11-23 15:13:35,352 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-11-23 15:13:35,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-23 15:13:35,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:13:35,357 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2022-11-23 15:13:35,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:13:35,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:13:35,563 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:13:35,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:13:35,563 INFO L85 PathProgramCache]: Analyzing trace with hash -163597749, now seen corresponding path program 5 times [2022-11-23 15:13:35,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:13:35,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787990309] [2022-11-23 15:13:35,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:13:35,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:13:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:13:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-23 15:13:38,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:13:38,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787990309] [2022-11-23 15:13:38,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787990309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:13:38,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517631407] [2022-11-23 15:13:38,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:13:38,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:13:38,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:13:38,216 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:13:38,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:20:58,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-23 15:20:58,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:20:58,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-23 15:20:58,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:20:58,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-23 15:20:58,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:21:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-23 15:21:01,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517631407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:21:01,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [461464347] [2022-11-23 15:21:01,544 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:21:01,544 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:21:01,544 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:21:01,544 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:21:01,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:21:01,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:01,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:01,606 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:21:01,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 15:21:01,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:01,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:01,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-23 15:21:01,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:01,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 15:21:01,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:01,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:01,703 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:21:01,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 238 treesize of output 235 [2022-11-23 15:21:01,749 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 16 treesize of output 12 [2022-11-23 15:21:01,768 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:21:01,769 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 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:21:01,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:01,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:01,851 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:21:01,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 99 [2022-11-23 15:21:01,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:01,954 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:21:01,954 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 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:21:01,965 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:21:02,194 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2258#(and (= (ite (= |ULTIMATE.start_main_#t~mem4#1| 42) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:21:02,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:21:02,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:21:02,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 49] total 97 [2022-11-23 15:21:02,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383136348] [2022-11-23 15:21:02,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:21:02,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-23 15:21:02,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:02,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-23 15:21:02,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4670, Invalid=5430, Unknown=0, NotChecked=0, Total=10100 [2022-11-23 15:21:02,205 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 97 states, 97 states have (on average 1.556701030927835) internal successors, (151), 97 states have internal predecessors, (151), 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) [2022-11-23 15:21:03,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:03,059 INFO L93 Difference]: Finished difference Result 248 states and 347 transitions. [2022-11-23 15:21:03,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-23 15:21:03,059 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.556701030927835) internal successors, (151), 97 states have internal predecessors, (151), 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 98 [2022-11-23 15:21:03,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:03,061 INFO L225 Difference]: With dead ends: 248 [2022-11-23 15:21:03,061 INFO L226 Difference]: Without dead ends: 196 [2022-11-23 15:21:03,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4670, Invalid=5430, Unknown=0, NotChecked=0, Total=10100 [2022-11-23 15:21:03,064 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:03,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:21:03,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-23 15:21:03,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-11-23 15:21:03,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.0153846153846153) internal successors, (198), 195 states have internal predecessors, (198), 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) [2022-11-23 15:21:03,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2022-11-23 15:21:03,080 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 98 [2022-11-23 15:21:03,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:03,081 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2022-11-23 15:21:03,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.556701030927835) internal successors, (151), 97 states have internal predecessors, (151), 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) [2022-11-23 15:21:03,082 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2022-11-23 15:21:03,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-23 15:21:03,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:03,085 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:03,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:21:03,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 15:21:03,300 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:21:03,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:03,300 INFO L85 PathProgramCache]: Analyzing trace with hash 57844555, now seen corresponding path program 6 times [2022-11-23 15:21:03,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:03,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696077471] [2022-11-23 15:21:03,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:03,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-23 15:21:11,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:11,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696077471] [2022-11-23 15:21:11,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696077471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:21:11,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492908232] [2022-11-23 15:21:11,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:21:11,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:11,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:11,328 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:21:11,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:21:11,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:21:11,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:21:11,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-23 15:21:11,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-23 15:21:12,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:21:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-23 15:21:22,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492908232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:21:22,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2042836777] [2022-11-23 15:21:22,892 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:21:22,892 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:21:22,892 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:21:22,893 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:21:22,893 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:21:22,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:22,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:22,937 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 15:21:22,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-23 15:21:22,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:22,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:22,985 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:21:22,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 15:21:23,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:23,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 15:21:23,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:23,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:23,093 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 15:21:23,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 233 treesize of output 236 [2022-11-23 15:21:23,176 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 16 treesize of output 12 [2022-11-23 15:21:23,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:23,197 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:21:23,198 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 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:21:23,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:23,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:23,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:23,229 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:21:23,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 85 [2022-11-23 15:21:23,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:23,279 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:21:23,279 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 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:21:23,291 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:21:31,146 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4487#(and (= (ite (= |ULTIMATE.start_main_#t~mem4#1| 42) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:21:31,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:21:31,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:21:31,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-11-23 15:21:31,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463117422] [2022-11-23 15:21:31,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:21:31,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-23 15:21:31,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:31,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-23 15:21:31,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18542, Invalid=20070, Unknown=0, NotChecked=0, Total=38612 [2022-11-23 15:21:31,157 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 192 states have internal predecessors, (199), 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) [2022-11-23 15:21:36,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:36,397 INFO L93 Difference]: Finished difference Result 488 states and 683 transitions. [2022-11-23 15:21:36,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-23 15:21:36,398 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 192 states have internal predecessors, (199), 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 194 [2022-11-23 15:21:36,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:36,401 INFO L225 Difference]: With dead ends: 488 [2022-11-23 15:21:36,401 INFO L226 Difference]: Without dead ends: 388 [2022-11-23 15:21:36,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 386 SyntacticMatches, 95 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28591 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=18542, Invalid=20070, Unknown=0, NotChecked=0, Total=38612 [2022-11-23 15:21:36,406 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 1363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1363 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:36,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1363 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 15:21:36,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-11-23 15:21:36,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2022-11-23 15:21:36,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.0077519379844961) internal successors, (390), 387 states have internal predecessors, (390), 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) [2022-11-23 15:21:36,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 390 transitions. [2022-11-23 15:21:36,442 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 390 transitions. Word has length 194 [2022-11-23 15:21:36,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:36,443 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 390 transitions. [2022-11-23 15:21:36,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 192 states have internal predecessors, (199), 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) [2022-11-23 15:21:36,443 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 390 transitions. [2022-11-23 15:21:36,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-11-23 15:21:36,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:36,452 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:36,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-23 15:21:36,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:36,661 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:21:36,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:36,662 INFO L85 PathProgramCache]: Analyzing trace with hash 314213707, now seen corresponding path program 7 times [2022-11-23 15:21:36,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:36,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711522902] [2022-11-23 15:21:36,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:36,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:22:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2022-11-23 15:22:03,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:22:03,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711522902] [2022-11-23 15:22:03,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711522902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:22:03,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007627912] [2022-11-23 15:22:03,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:22:03,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:22:03,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:22:03,541 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:22:03,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:22:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:22:04,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 2723 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-23 15:22:04,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:22:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2022-11-23 15:22:04,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:22:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2022-11-23 15:22:48,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007627912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:22:48,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [897959531] [2022-11-23 15:22:48,108 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:22:48,108 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:22:48,109 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:22:48,109 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:22:48,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:22:48,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:22:48,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:22:48,165 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:22:48,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 15:22:48,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:22:48,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:22:48,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-23 15:22:48,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:22:48,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 15:22:48,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:22:48,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:22:48,266 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:22:48,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 238 treesize of output 235 [2022-11-23 15:22:48,307 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 16 treesize of output 12 [2022-11-23 15:22:48,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:22:48,328 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:22:48,328 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 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:22:48,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:22:48,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:22:48,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:22:48,378 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:22:48,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 85 [2022-11-23 15:22:48,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:22:48,419 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:22:48,420 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 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:22:48,433 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:23:17,745 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8924#(and (= (ite (= |ULTIMATE.start_main_#t~mem4#1| 42) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:23:17,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:23:17,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:23:17,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2022-11-23 15:23:17,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971682826] [2022-11-23 15:23:17,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:23:17,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-11-23 15:23:17,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:23:17,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-11-23 15:23:17,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73934, Invalid=76998, Unknown=0, NotChecked=0, Total=150932 [2022-11-23 15:23:17,775 INFO L87 Difference]: Start difference. First operand 388 states and 390 transitions. Second operand has 385 states, 385 states have (on average 1.0155844155844156) internal successors, (391), 384 states have internal predecessors, (391), 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) [2022-11-23 15:24:21,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:24:21,856 INFO L93 Difference]: Finished difference Result 968 states and 1355 transitions. [2022-11-23 15:24:21,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-11-23 15:24:21,857 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0155844155844156) internal successors, (391), 384 states have internal predecessors, (391), 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 386 [2022-11-23 15:24:21,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:24:21,860 INFO L225 Difference]: With dead ends: 968 [2022-11-23 15:24:21,861 INFO L226 Difference]: Without dead ends: 772 [2022-11-23 15:24:21,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1348 GetRequests, 770 SyntacticMatches, 191 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112495 ImplicationChecksByTransitivity, 86.5s TimeCoverageRelationStatistics Valid=73934, Invalid=76998, Unknown=0, NotChecked=0, Total=150932 [2022-11-23 15:24:21,870 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 2331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 3119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2331 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:24:21,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 3119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2331 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-23 15:24:21,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-11-23 15:24:21,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 772. [2022-11-23 15:24:21,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 1.0038910505836576) internal successors, (774), 771 states have internal predecessors, (774), 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) [2022-11-23 15:24:21,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 774 transitions. [2022-11-23 15:24:21,910 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 774 transitions. Word has length 386 [2022-11-23 15:24:21,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:24:21,910 INFO L495 AbstractCegarLoop]: Abstraction has 772 states and 774 transitions. [2022-11-23 15:24:21,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0155844155844156) internal successors, (391), 384 states have internal predecessors, (391), 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) [2022-11-23 15:24:21,911 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 774 transitions. [2022-11-23 15:24:21,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2022-11-23 15:24:21,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:24:21,939 INFO L195 NwaCegarLoop]: trace histogram [382, 382, 1, 1, 1, 1, 1, 1] [2022-11-23 15:24:21,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:24:22,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:24:22,150 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:24:22,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:24:22,150 INFO L85 PathProgramCache]: Analyzing trace with hash -724416181, now seen corresponding path program 8 times [2022-11-23 15:24:22,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:24:22,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474973797] [2022-11-23 15:24:22,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:22,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:24:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:13,960 INFO L134 CoverageAnalysis]: Checked inductivity of 146306 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 73153 trivial. 0 not checked. [2022-11-23 15:26:13,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:13,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474973797] [2022-11-23 15:26:13,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474973797] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:26:13,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16391128] [2022-11-23 15:26:13,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:26:13,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:13,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:26:13,967 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:26:13,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b303b87-1317-4d78-81a3-2c521eef470b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process