./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_maxInArray_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_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/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_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_maxInArray_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/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_c0f0fade-3941-4185-845b-5fb2ea649b9e/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 418a605fc1323c67278586b967efb51b918569726e40c2a0630b64c1083a6ff9 --- 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 15:59:34,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:59:34,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:59:34,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:59:34,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:59:34,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:59:34,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:59:34,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:59:34,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:59:34,871 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:59:34,872 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:59:34,874 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:59:34,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:59:34,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:59:34,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:59:34,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:59:34,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:59:34,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:59:34,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:59:34,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:59:34,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:59:34,886 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:59:34,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:59:34,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:59:34,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:59:34,892 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:59:34,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:59:34,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:59:34,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:59:34,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:59:34,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:59:34,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:59:34,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:59:34,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:59:34,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:59:34,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:59:34,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:59:34,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:59:34,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:59:34,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:59:34,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:59:34,904 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:59:34,928 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:59:34,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:59:34,929 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:59:34,929 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:59:34,930 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:59:34,930 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:59:34,930 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:59:34,931 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:59:34,931 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:59:34,931 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:59:34,931 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:59:34,932 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:59:34,932 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:59:34,932 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:59:34,932 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:59:34,932 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:59:34,933 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:59:34,933 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:59:34,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:59:34,934 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:59:34,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:59:34,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:59:34,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:59:34,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:59:34,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:59:34,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:59:34,935 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:59:34,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:59:34,936 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:59:34,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:59:34,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:59:34,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:59:34,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:59:34,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:59:34,937 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:59:34,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:59:34,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:59:34,938 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:59:34,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:59:34,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:59:34,938 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:59:34,939 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_c0f0fade-3941-4185-845b-5fb2ea649b9e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 418a605fc1323c67278586b967efb51b918569726e40c2a0630b64c1083a6ff9 [2022-11-23 15:59:35,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:59:35,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:59:35,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:59:35,254 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:59:35,254 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:59:35,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-examples/standard_maxInArray_ground.i [2022-11-23 15:59:38,397 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:59:38,699 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:59:38,699 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/sv-benchmarks/c/array-examples/standard_maxInArray_ground.i [2022-11-23 15:59:38,705 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/data/c46ebbba9/40c8699107614320b49864b4e30e2968/FLAGc3373f5bf [2022-11-23 15:59:38,727 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/data/c46ebbba9/40c8699107614320b49864b4e30e2968 [2022-11-23 15:59:38,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:59:38,739 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:59:38,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:59:38,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:59:38,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:59:38,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:59:38" (1/1) ... [2022-11-23 15:59:38,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@723d803d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:38, skipping insertion in model container [2022-11-23 15:59:38,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:59:38" (1/1) ... [2022-11-23 15:59:38,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:59:38,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:59:38,940 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_c0f0fade-3941-4185-845b-5fb2ea649b9e/sv-benchmarks/c/array-examples/standard_maxInArray_ground.i[819,832] [2022-11-23 15:59:38,957 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:59:38,966 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:59:38,980 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_c0f0fade-3941-4185-845b-5fb2ea649b9e/sv-benchmarks/c/array-examples/standard_maxInArray_ground.i[819,832] [2022-11-23 15:59:38,987 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:59:39,003 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:59:39,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:39 WrapperNode [2022-11-23 15:59:39,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:59:39,005 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:59:39,005 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:59:39,006 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:59:39,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:39" (1/1) ... [2022-11-23 15:59:39,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:39" (1/1) ... [2022-11-23 15:59:39,038 INFO L138 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2022-11-23 15:59:39,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:59:39,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:59:39,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:59:39,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:59:39,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:39" (1/1) ... [2022-11-23 15:59:39,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:39" (1/1) ... [2022-11-23 15:59:39,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:39" (1/1) ... [2022-11-23 15:59:39,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:39" (1/1) ... [2022-11-23 15:59:39,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:39" (1/1) ... [2022-11-23 15:59:39,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:39" (1/1) ... [2022-11-23 15:59:39,064 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:39" (1/1) ... [2022-11-23 15:59:39,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:39" (1/1) ... [2022-11-23 15:59:39,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:59:39,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:59:39,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:59:39,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:59:39,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:39" (1/1) ... [2022-11-23 15:59:39,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:59:39,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:59:39,117 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:59:39,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:59:39,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:59:39,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:59:39,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:59:39,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:59:39,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:59:39,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:59:39,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:59:39,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:59:39,250 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:59:39,252 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:59:39,453 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:59:39,560 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:59:39,561 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 15:59:39,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:59:39 BoogieIcfgContainer [2022-11-23 15:59:39,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:59:39,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:59:39,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:59:39,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:59:39,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:59:38" (1/3) ... [2022-11-23 15:59:39,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1315ce9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:59:39, skipping insertion in model container [2022-11-23 15:59:39,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:39" (2/3) ... [2022-11-23 15:59:39,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1315ce9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:59:39, skipping insertion in model container [2022-11-23 15:59:39,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:59:39" (3/3) ... [2022-11-23 15:59:39,574 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_maxInArray_ground.i [2022-11-23 15:59:39,618 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:59:39,618 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:59:39,722 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:59:39,731 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;@5b339c0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:59:39,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:59:39,738 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 15:59:39,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 15:59:39,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:59:39,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 15:59:39,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:59:39,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:59:39,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1447469935, now seen corresponding path program 1 times [2022-11-23 15:59:39,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:59:39,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217534369] [2022-11-23 15:59:39,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:39,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:59:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:40,122 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 15:59:40,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:59:40,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217534369] [2022-11-23 15:59:40,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217534369] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:59:40,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:59:40,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:59:40,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672369730] [2022-11-23 15:59:40,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:59:40,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:59:40,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:59:40,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:59:40,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:59:40,204 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 15:59:40,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:59:40,283 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2022-11-23 15:59:40,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:59:40,288 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 15:59:40,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:59:40,298 INFO L225 Difference]: With dead ends: 17 [2022-11-23 15:59:40,299 INFO L226 Difference]: Without dead ends: 9 [2022-11-23 15:59:40,302 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 15:59:40,313 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:59:40,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:59:40,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-23 15:59:40,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-23 15:59:40,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:59:40,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-11-23 15:59:40,360 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2022-11-23 15:59:40,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:59:40,361 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-11-23 15:59:40,362 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 15:59:40,362 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-11-23 15:59:40,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 15:59:40,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:59:40,363 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:59:40,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:59:40,363 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:59:40,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:59:40,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2119875666, now seen corresponding path program 1 times [2022-11-23 15:59:40,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:59:40,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697396067] [2022-11-23 15:59:40,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:40,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:59:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:40,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:59:40,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:59:40,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697396067] [2022-11-23 15:59:40,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697396067] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:59:40,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201989841] [2022-11-23 15:59:40,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:40,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:59:40,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:59:40,527 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:59:40,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:59:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:40,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:59:40,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:59:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:59:40,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:59:40,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201989841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:59:40,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:59:40,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-23 15:59:40,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446628537] [2022-11-23 15:59:40,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:59:40,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:59:40,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:59:40,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:59:40,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:59:40,632 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:59:40,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:59:40,658 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2022-11-23 15:59:40,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:59:40,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 15:59:40,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:59:40,660 INFO L225 Difference]: With dead ends: 15 [2022-11-23 15:59:40,660 INFO L226 Difference]: Without dead ends: 10 [2022-11-23 15:59:40,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:59:40,662 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:59:40,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:59:40,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-23 15:59:40,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-23 15:59:40,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:59:40,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-23 15:59:40,666 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2022-11-23 15:59:40,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:59:40,667 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-23 15:59:40,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:59:40,667 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-23 15:59:40,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 15:59:40,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:59:40,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:59:40,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:59:40,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:59:40,877 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:59:40,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:59:40,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1298872523, now seen corresponding path program 1 times [2022-11-23 15:59:40,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:59:40,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464331902] [2022-11-23 15:59:40,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:40,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:59:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:40,947 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 15:59:40,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:59:40,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464331902] [2022-11-23 15:59:40,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464331902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:59:40,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931789860] [2022-11-23 15:59:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:40,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:59:40,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:59:40,950 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:59:40,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:59:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:41,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:59:41,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:59:41,101 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 15:59:41,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:59:41,147 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 15:59:41,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931789860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:59:41,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1951696266] [2022-11-23 15:59:41,182 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:59:41,182 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:59:41,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:59:41,194 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:59:41,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:59:41,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:41,333 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:59:41,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-23 15:59:41,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:41,395 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 15:59:41,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 15:59:41,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:41,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 15:59:41,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:41,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:59:41,705 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 15:59:41,706 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 192 treesize of output 191 [2022-11-23 15:59:41,940 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 15:59:42,153 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:59:42,395 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '159#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (<= |ULTIMATE.start_main_#t~mem6#1| |ULTIMATE.start_main_~max~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-23 15:59:42,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:59:42,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:59:42,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 15:59:42,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909490958] [2022-11-23 15:59:42,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:59:42,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:59:42,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:59:42,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:59:42,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:59:42,402 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 15:59:42,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:59:42,454 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2022-11-23 15:59:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:59:42,455 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 15:59:42,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:59:42,456 INFO L225 Difference]: With dead ends: 20 [2022-11-23 15:59:42,456 INFO L226 Difference]: Without dead ends: 13 [2022-11-23 15:59:42,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:59:42,459 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:59:42,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:59:42,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-23 15:59:42,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-23 15:59:42,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 15:59:42,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-23 15:59:42,470 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2022-11-23 15:59:42,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:59:42,471 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-23 15:59:42,471 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 15:59:42,472 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-23 15:59:42,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:59:42,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:59:42,473 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:59:42,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:59:42,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:59:42,679 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:59:42,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:59:42,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1743994924, now seen corresponding path program 2 times [2022-11-23 15:59:42,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:59:42,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090126728] [2022-11-23 15:59:42,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:42,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:59:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:59:42,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:59:42,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090126728] [2022-11-23 15:59:42,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090126728] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:59:42,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177666127] [2022-11-23 15:59:42,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:59:42,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:59:42,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:59:42,826 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:59:42,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:59:42,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 15:59:42,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:59:42,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:59:42,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:59:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:59:42,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:59:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:59:42,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177666127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:59:42,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [176391444] [2022-11-23 15:59:42,930 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:59:42,931 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:59:42,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:59:42,931 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:59:42,931 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:59:42,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:42,970 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 15:59:42,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 15:59:42,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:42,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 15:59:43,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:43,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 15:59:43,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:43,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:43,107 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:59:43,108 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 202 treesize of output 190 [2022-11-23 15:59:43,176 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 15:59:43,260 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:59:43,462 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '283#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (<= |ULTIMATE.start_main_#t~mem6#1| |ULTIMATE.start_main_~max~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-23 15:59:43,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:59:43,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:59:43,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 15:59:43,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843186903] [2022-11-23 15:59:43,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:59:43,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:59:43,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:59:43,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:59:43,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:59:43,466 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 15:59:43,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:59:43,507 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2022-11-23 15:59:43,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:59:43,508 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 11 [2022-11-23 15:59:43,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:59:43,508 INFO L225 Difference]: With dead ends: 21 [2022-11-23 15:59:43,508 INFO L226 Difference]: Without dead ends: 16 [2022-11-23 15:59:43,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:59:43,510 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:59:43,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:59:43,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-23 15:59:43,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-23 15:59:43,514 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 15:59:43,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-11-23 15:59:43,514 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2022-11-23 15:59:43,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:59:43,515 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-11-23 15:59:43,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 15:59:43,515 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-11-23 15:59:43,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 15:59:43,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:59:43,516 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-11-23 15:59:43,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:59:43,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:59:43,723 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:59:43,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:59:43,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2024096657, now seen corresponding path program 3 times [2022-11-23 15:59:43,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:59:43,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180773632] [2022-11-23 15:59:43,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:43,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:59:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:43,878 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 15:59:43,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:59:43,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180773632] [2022-11-23 15:59:43,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180773632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:59:43,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869618072] [2022-11-23 15:59:43,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:59:43,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:59:43,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:59:43,881 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:59:43,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:59:43,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:59:43,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:59:43,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:59:43,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:59:44,002 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 15:59:44,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:59:44,094 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 15:59:44,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869618072] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:59:44,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [632354923] [2022-11-23 15:59:44,098 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:59:44,099 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:59:44,099 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:59:44,099 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:59:44,100 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:59:44,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:44,139 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:59:44,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-23 15:59:44,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:44,172 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 15:59:44,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 15:59:44,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:44,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 15:59:44,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:44,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:44,302 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:59:44,302 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 202 treesize of output 190 [2022-11-23 15:59:44,358 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 15:59:44,434 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:59:44,639 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '439#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (<= |ULTIMATE.start_main_#t~mem6#1| |ULTIMATE.start_main_~max~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-23 15:59:44,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:59:44,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:59:44,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 15:59:44,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650008602] [2022-11-23 15:59:44,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:59:44,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 15:59:44,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:59:44,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 15:59:44,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2022-11-23 15:59:44,641 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 15:59:44,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:59:44,701 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-11-23 15:59:44,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:59:44,701 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 15:59:44,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:59:44,702 INFO L225 Difference]: With dead ends: 32 [2022-11-23 15:59:44,702 INFO L226 Difference]: Without dead ends: 22 [2022-11-23 15:59:44,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2022-11-23 15:59:44,703 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:59:44,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:59:44,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-23 15:59:44,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-23 15:59:44,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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 15:59:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-11-23 15:59:44,709 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2022-11-23 15:59:44,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:59:44,709 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-11-23 15:59:44,710 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 15:59:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-11-23 15:59:44,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 15:59:44,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:59:44,711 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1] [2022-11-23 15:59:44,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:59:44,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:59:44,918 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:59:44,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:59:44,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1267977231, now seen corresponding path program 4 times [2022-11-23 15:59:44,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:59:44,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756679048] [2022-11-23 15:59:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:44,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:59:44,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:59:45,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:59:45,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756679048] [2022-11-23 15:59:45,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756679048] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:59:45,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128993420] [2022-11-23 15:59:45,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:59:45,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:59:45,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:59:45,267 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:59:45,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:59:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:45,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 15:59:45,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:59:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:59:45,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:59:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:59:45,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128993420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:59:45,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2087457052] [2022-11-23 15:59:45,676 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:59:45,677 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:59:45,677 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:59:45,677 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:59:45,677 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:59:45,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:45,709 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:59:45,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-23 15:59:45,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:45,739 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 15:59:45,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 15:59:45,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:45,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 15:59:45,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:45,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:59:45,867 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 15:59:45,868 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 192 treesize of output 191 [2022-11-23 15:59:45,961 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 15:59:46,019 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:59:46,245 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '677#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (<= |ULTIMATE.start_main_#t~mem6#1| |ULTIMATE.start_main_~max~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-23 15:59:46,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:59:46,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:59:46,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-23 15:59:46,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926129430] [2022-11-23 15:59:46,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:59:46,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 15:59:46,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:59:46,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 15:59:46,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2022-11-23 15:59:46,248 INFO L87 Difference]: Start difference. First operand 22 states and 24 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 15:59:46,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:59:46,320 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2022-11-23 15:59:46,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 15:59:46,321 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 20 [2022-11-23 15:59:46,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:59:46,322 INFO L225 Difference]: With dead ends: 44 [2022-11-23 15:59:46,322 INFO L226 Difference]: Without dead ends: 34 [2022-11-23 15:59:46,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2022-11-23 15:59:46,323 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:59:46,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:59:46,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-23 15:59:46,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-23 15:59:46,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 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 15:59:46,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-11-23 15:59:46,329 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 20 [2022-11-23 15:59:46,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:59:46,330 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-11-23 15:59:46,330 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 15:59:46,330 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-11-23 15:59:46,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 15:59:46,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:59:46,331 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 1, 1, 1, 1, 1, 1] [2022-11-23 15:59:46,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:59:46,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:59:46,532 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:59:46,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:59:46,532 INFO L85 PathProgramCache]: Analyzing trace with hash 999734449, now seen corresponding path program 5 times [2022-11-23 15:59:46,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:59:46,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406507695] [2022-11-23 15:59:46,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:46,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:59:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:47,196 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:59:47,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:59:47,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406507695] [2022-11-23 15:59:47,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406507695] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:59:47,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295457388] [2022-11-23 15:59:47,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:59:47,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:59:47,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:59:47,198 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:59:47,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:59:47,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 15:59:47,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:59:47,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:59:47,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:59:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 15:59:47,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:59:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 15:59:47,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295457388] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:59:47,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [244331428] [2022-11-23 15:59:47,517 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:59:47,517 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:59:47,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:59:47,518 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:59:47,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:59:47,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:47,554 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 15:59:47,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 15:59:47,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:47,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 15:59:47,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:47,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 15:59:47,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:47,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:47,666 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:59:47,667 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 202 treesize of output 190 [2022-11-23 15:59:47,708 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 15:59:47,754 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:59:48,002 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1045#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (<= |ULTIMATE.start_main_#t~mem6#1| |ULTIMATE.start_main_~max~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-23 15:59:48,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:59:48,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:59:48,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-23 15:59:48,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229174909] [2022-11-23 15:59:48,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:59:48,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 15:59:48,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:59:48,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 15:59:48,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1179, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 15:59:48,005 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:59:48,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:59:48,082 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2022-11-23 15:59:48,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-23 15:59:48,083 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-23 15:59:48,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:59:48,084 INFO L225 Difference]: With dead ends: 51 [2022-11-23 15:59:48,084 INFO L226 Difference]: Without dead ends: 41 [2022-11-23 15:59:48,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=381, Invalid=1179, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 15:59:48,085 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:59:48,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:59:48,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-23 15:59:48,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-23 15:59:48,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:59:48,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-11-23 15:59:48,092 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 32 [2022-11-23 15:59:48,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:59:48,092 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-11-23 15:59:48,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:59:48,093 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-11-23 15:59:48,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 15:59:48,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:59:48,094 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 1, 1, 1, 1, 1, 1] [2022-11-23 15:59:48,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-23 15:59:48,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 15:59:48,300 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:59:48,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:59:48,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1594119534, now seen corresponding path program 6 times [2022-11-23 15:59:48,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:59:48,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193554418] [2022-11-23 15:59:48,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:48,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:59:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 15:59:49,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:59:49,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193554418] [2022-11-23 15:59:49,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193554418] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:59:49,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156634416] [2022-11-23 15:59:49,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:59:49,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:59:49,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:59:49,095 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:59:49,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:59:49,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:59:49,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:59:49,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 15:59:49,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:59:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 15:59:49,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:59:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 15:59:50,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156634416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:59:50,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [206204213] [2022-11-23 15:59:50,305 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:59:50,305 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:59:50,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:59:50,306 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:59:50,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:59:50,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:50,345 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 15:59:50,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 15:59:50,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:50,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 15:59:50,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:50,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 15:59:50,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:50,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:59:50,462 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 15:59:50,463 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 192 treesize of output 191 [2022-11-23 15:59:50,537 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 15:59:50,596 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:59:50,840 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1499#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (<= |ULTIMATE.start_main_#t~mem6#1| |ULTIMATE.start_main_~max~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-23 15:59:50,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:59:50,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:59:50,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-23 15:59:50,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542270153] [2022-11-23 15:59:50,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:59:50,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-23 15:59:50,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:59:50,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-23 15:59:50,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1291, Invalid=1789, Unknown=0, NotChecked=0, Total=3080 [2022-11-23 15:59:50,844 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:59:50,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:59:50,983 INFO L93 Difference]: Finished difference Result 82 states and 110 transitions. [2022-11-23 15:59:50,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-23 15:59:50,984 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-23 15:59:50,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:59:50,985 INFO L225 Difference]: With dead ends: 82 [2022-11-23 15:59:50,985 INFO L226 Difference]: Without dead ends: 66 [2022-11-23 15:59:50,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1291, Invalid=1789, Unknown=0, NotChecked=0, Total=3080 [2022-11-23 15:59:50,987 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:59:50,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:59:50,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-23 15:59:50,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-23 15:59:50,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 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 15:59:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2022-11-23 15:59:50,996 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 39 [2022-11-23 15:59:50,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:59:50,997 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2022-11-23 15:59:50,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:59:50,997 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2022-11-23 15:59:50,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-23 15:59:50,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:59:50,999 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 1, 1, 1, 1, 1, 1] [2022-11-23 15:59:51,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:59:51,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 15:59:51,207 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:59:51,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:59:51,207 INFO L85 PathProgramCache]: Analyzing trace with hash -480561039, now seen corresponding path program 7 times [2022-11-23 15:59:51,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:59:51,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404883325] [2022-11-23 15:59:51,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:51,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:59:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:53,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 15:59:53,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:59:53,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404883325] [2022-11-23 15:59:53,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404883325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:59:53,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067383050] [2022-11-23 15:59:53,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:59:53,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:59:53,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:59:53,943 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:59:53,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:59:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:54,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-23 15:59:54,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:59:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 15:59:54,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:59:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 15:59:58,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067383050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:59:58,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1929865556] [2022-11-23 15:59:58,124 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:59:58,124 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:59:58,124 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:59:58,125 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:59:58,125 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:59:58,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:58,153 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 15:59:58,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 15:59:58,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:58,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 15:59:58,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:58,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 15:59:58,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:58,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:58,249 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:59:58,250 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 202 treesize of output 190 [2022-11-23 15:59:58,307 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 15:59:58,368 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:59:58,719 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2265#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (<= |ULTIMATE.start_main_#t~mem6#1| |ULTIMATE.start_main_~max~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-23 15:59:58,719 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:59:58,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:59:58,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-23 15:59:58,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696235425] [2022-11-23 15:59:58,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:59:58,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-23 15:59:58,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:59:58,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-23 15:59:58,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5066, Invalid=6064, Unknown=0, NotChecked=0, Total=11130 [2022-11-23 15:59:58,731 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 101 states, 101 states have (on average 1.0594059405940595) internal successors, (107), 100 states have internal predecessors, (107), 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 15:59:59,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:59:59,001 INFO L93 Difference]: Finished difference Result 132 states and 185 transitions. [2022-11-23 15:59:59,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-23 15:59:59,002 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0594059405940595) internal successors, (107), 100 states have internal predecessors, (107), 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 64 [2022-11-23 15:59:59,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:59:59,008 INFO L225 Difference]: With dead ends: 132 [2022-11-23 15:59:59,008 INFO L226 Difference]: Without dead ends: 116 [2022-11-23 15:59:59,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5066, Invalid=6064, Unknown=0, NotChecked=0, Total=11130 [2022-11-23 15:59:59,015 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:59:59,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:59:59,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-23 15:59:59,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-11-23 15:59:59,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 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 15:59:59,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2022-11-23 15:59:59,032 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 64 [2022-11-23 15:59:59,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:59:59,033 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2022-11-23 15:59:59,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0594059405940595) internal successors, (107), 100 states have internal predecessors, (107), 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 15:59:59,033 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2022-11-23 15:59:59,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-23 15:59:59,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:59:59,035 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 1, 1, 1, 1, 1, 1] [2022-11-23 15:59:59,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:59:59,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:59:59,236 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:59:59,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:59:59,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1260710801, now seen corresponding path program 8 times [2022-11-23 15:59:59,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:59:59,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637204779] [2022-11-23 15:59:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:59,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:59:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:00:07,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4906 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 16:00:07,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:00:07,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637204779] [2022-11-23 16:00:07,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637204779] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:00:07,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61006516] [2022-11-23 16:00:07,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:00:07,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:00:07,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:00:07,461 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:00:07,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 16:00:07,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 16:00:07,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:00:07,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 16:00:07,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:00:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4906 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2022-11-23 16:00:08,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:00:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4906 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2022-11-23 16:00:08,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61006516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:00:08,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1282157393] [2022-11-23 16:00:08,962 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 16:00:08,962 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:00:08,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:00:08,963 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:00:08,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:00:08,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:00:08,995 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 16:00:08,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-23 16:00:09,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:00:09,030 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 16:00:09,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 16:00:09,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:00:09,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 16:00:09,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:00:09,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:00:09,152 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 16:00:09,152 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 202 treesize of output 190 [2022-11-23 16:00:09,198 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 16:00:09,251 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:00:09,765 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3553#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (<= |ULTIMATE.start_main_#t~mem6#1| |ULTIMATE.start_main_~max~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-23 16:00:09,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:00:09,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:00:09,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-11-23 16:00:09,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467137672] [2022-11-23 16:00:09,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:00:09,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-23 16:00:09,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:00:09,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-23 16:00:09,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5341, Invalid=10915, Unknown=0, NotChecked=0, Total=16256 [2022-11-23 16:00:09,773 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand has 123 states, 123 states have (on average 1.065040650406504) internal successors, (131), 123 states have internal predecessors, (131), 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 16:00:10,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:00:10,037 INFO L93 Difference]: Finished difference Result 145 states and 161 transitions. [2022-11-23 16:00:10,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-23 16:00:10,038 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.065040650406504) internal successors, (131), 123 states have internal predecessors, (131), 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 114 [2022-11-23 16:00:10,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:00:10,043 INFO L225 Difference]: With dead ends: 145 [2022-11-23 16:00:10,044 INFO L226 Difference]: Without dead ends: 129 [2022-11-23 16:00:10,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5341, Invalid=10915, Unknown=0, NotChecked=0, Total=16256 [2022-11-23 16:00:10,050 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:00:10,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:00:10,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-23 16:00:10,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-11-23 16:00:10,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0234375) internal successors, (131), 128 states have internal predecessors, (131), 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 16:00:10,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2022-11-23 16:00:10,087 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 114 [2022-11-23 16:00:10,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:00:10,087 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2022-11-23 16:00:10,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.065040650406504) internal successors, (131), 123 states have internal predecessors, (131), 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 16:00:10,088 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2022-11-23 16:00:10,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-23 16:00:10,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:00:10,096 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 1, 1, 1, 1, 1, 1] [2022-11-23 16:00:10,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-23 16:00:10,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:00:10,297 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:00:10,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:00:10,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1882835090, now seen corresponding path program 9 times [2022-11-23 16:00:10,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:00:10,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586619301] [2022-11-23 16:00:10,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:00:10,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:00:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:00:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5203 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 16:00:18,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:00:18,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586619301] [2022-11-23 16:00:18,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586619301] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:00:18,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195361492] [2022-11-23 16:00:18,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:00:18,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:00:18,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:00:18,057 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:00:18,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 16:00:18,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:00:18,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:00:18,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-23 16:00:18,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:00:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5203 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 16:00:18,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:00:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5203 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 16:00:31,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195361492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:00:31,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [554527906] [2022-11-23 16:00:31,101 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 16:00:31,101 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:00:31,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:00:31,102 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:00:31,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:00:31,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:00:31,137 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 16:00:31,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 16:00:31,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:00:31,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 16:00:31,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:00:31,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 16:00:31,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:00:31,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:00:31,232 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 16:00:31,233 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 192 treesize of output 191 [2022-11-23 16:00:31,308 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 16:00:31,374 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:00:31,872 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5051#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (<= |ULTIMATE.start_main_#t~mem6#1| |ULTIMATE.start_main_~max~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-23 16:00:31,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:00:31,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:00:31,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-23 16:00:31,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359113035] [2022-11-23 16:00:31,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:00:31,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-23 16:00:31,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:00:31,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-23 16:00:31,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20519, Invalid=22537, Unknown=0, NotChecked=0, Total=43056 [2022-11-23 16:00:31,882 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand has 203 states, 203 states have (on average 1.0295566502463054) internal successors, (209), 202 states have internal predecessors, (209), 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 16:00:32,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:00:32,564 INFO L93 Difference]: Finished difference Result 258 states and 362 transitions. [2022-11-23 16:00:32,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-23 16:00:32,565 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0295566502463054) internal successors, (209), 202 states have internal predecessors, (209), 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 127 [2022-11-23 16:00:32,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:00:32,567 INFO L225 Difference]: With dead ends: 258 [2022-11-23 16:00:32,567 INFO L226 Difference]: Without dead ends: 230 [2022-11-23 16:00:32,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=20519, Invalid=22537, Unknown=0, NotChecked=0, Total=43056 [2022-11-23 16:00:32,571 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:00:32,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 16:00:32,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-23 16:00:32,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2022-11-23 16:00:32,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.0131004366812226) internal successors, (232), 229 states have internal predecessors, (232), 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 16:00:32,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 232 transitions. [2022-11-23 16:00:32,588 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 232 transitions. Word has length 127 [2022-11-23 16:00:32,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:00:32,589 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 232 transitions. [2022-11-23 16:00:32,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0295566502463054) internal successors, (209), 202 states have internal predecessors, (209), 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 16:00:32,590 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 232 transitions. [2022-11-23 16:00:32,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-11-23 16:00:32,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:00:32,592 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 1, 1, 1, 1, 1, 1] [2022-11-23 16:00:32,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 16:00:32,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 16:00:32,805 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:00:32,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:00:32,805 INFO L85 PathProgramCache]: Analyzing trace with hash 882089521, now seen corresponding path program 10 times [2022-11-23 16:00:32,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:00:32,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109422070] [2022-11-23 16:00:32,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:00:32,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:00:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:00:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 20353 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 16:00:59,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:00:59,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109422070] [2022-11-23 16:00:59,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109422070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:00:59,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525522905] [2022-11-23 16:00:59,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 16:00:59,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:00:59,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:00:59,271 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:00:59,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 16:00:59,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:00:59,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 1941 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-23 16:00:59,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:01:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20353 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 16:01:00,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:01:50,873 INFO L134 CoverageAnalysis]: Checked inductivity of 20353 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 16:01:50,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525522905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:01:50,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1023325511] [2022-11-23 16:01:50,876 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 16:01:50,876 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:01:50,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:01:50,876 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:01:50,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:01:50,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:01:50,906 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 16:01:50,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-23 16:01:50,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:01:50,934 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 16:01:50,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 16:01:50,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:01:50,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 16:01:51,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:01:51,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:01:51,029 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 16:01:51,030 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 192 treesize of output 191 [2022-11-23 16:01:51,107 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 16:01:51,177 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:01:52,097 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7785#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (<= |ULTIMATE.start_main_#t~mem6#1| |ULTIMATE.start_main_~max~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-23 16:01:52,097 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:01:52,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:01:52,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-23 16:01:52,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107125696] [2022-11-23 16:01:52,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:01:52,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-23 16:01:52,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:52,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-23 16:01:52,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81826, Invalid=85864, Unknown=0, NotChecked=0, Total=167690 [2022-11-23 16:01:52,131 INFO L87 Difference]: Start difference. First operand 230 states and 232 transitions. Second operand has 405 states, 405 states have (on average 1.0148148148148148) internal successors, (411), 404 states have internal predecessors, (411), 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 16:01:54,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:54,783 INFO L93 Difference]: Finished difference Result 460 states and 665 transitions. [2022-11-23 16:01:54,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-23 16:01:54,784 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0148148148148148) internal successors, (411), 404 states have internal predecessors, (411), 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 228 [2022-11-23 16:01:54,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:54,787 INFO L225 Difference]: With dead ends: 460 [2022-11-23 16:01:54,787 INFO L226 Difference]: Without dead ends: 432 [2022-11-23 16:01:54,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 884 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 67.8s TimeCoverageRelationStatistics Valid=81826, Invalid=85864, Unknown=0, NotChecked=0, Total=167690 [2022-11-23 16:01:54,796 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:54,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 16:01:54,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-11-23 16:01:54,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2022-11-23 16:01:54,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.0069605568445477) internal successors, (434), 431 states have internal predecessors, (434), 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 16:01:54,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 434 transitions. [2022-11-23 16:01:54,846 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 434 transitions. Word has length 228 [2022-11-23 16:01:54,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:54,847 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 434 transitions. [2022-11-23 16:01:54,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0148148148148148) internal successors, (411), 404 states have internal predecessors, (411), 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 16:01:54,848 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 434 transitions. [2022-11-23 16:01:54,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2022-11-23 16:01:54,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:54,858 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:54,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 16:01:55,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 16:01:55,068 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:55,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:55,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1440144081, now seen corresponding path program 11 times [2022-11-23 16:01:55,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:55,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915525019] [2022-11-23 16:01:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:55,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 81256 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 16:03:43,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:43,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915525019] [2022-11-23 16:03:43,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915525019] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:03:43,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829470360] [2022-11-23 16:03:43,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:03:43,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:03:43,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:03:43,811 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:03:43,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 16:03:45,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-23 16:03:45,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:03:45,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 16:03:45,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:03:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 81256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81003 trivial. 0 not checked. [2022-11-23 16:03:49,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:03:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 81256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81003 trivial. 0 not checked. [2022-11-23 16:03:54,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829470360] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:03:54,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [554600241] [2022-11-23 16:03:54,201 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 16:03:54,202 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:03:54,202 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:03:54,202 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:03:54,202 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:03:54,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:03:54,230 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 16:03:54,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-23 16:03:54,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:03:54,257 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 16:03:54,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 16:03:54,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:03:54,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 16:03:54,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:03:54,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:03:54,348 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 16:03:54,348 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 202 treesize of output 190 [2022-11-23 16:03:54,387 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 16:03:54,436 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:03:56,121 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12585#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (<= |ULTIMATE.start_main_#t~mem6#1| |ULTIMATE.start_main_~max~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-23 16:03:56,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:03:56,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:03:56,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 25, 25] total 451 [2022-11-23 16:03:56,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190895070] [2022-11-23 16:03:56,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:03:56,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 451 states [2022-11-23 16:03:56,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:56,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 451 interpolants. [2022-11-23 16:03:56,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82953, Invalid=124527, Unknown=0, NotChecked=0, Total=207480 [2022-11-23 16:03:56,143 INFO L87 Difference]: Start difference. First operand 432 states and 434 transitions. Second operand has 451 states, 451 states have (on average 1.017738359201774) internal successors, (459), 451 states have internal predecessors, (459), 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 16:04:00,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:04:00,015 INFO L93 Difference]: Finished difference Result 485 states and 513 transitions. [2022-11-23 16:04:00,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 451 states. [2022-11-23 16:04:00,017 INFO L78 Accepts]: Start accepts. Automaton has has 451 states, 451 states have (on average 1.017738359201774) internal successors, (459), 451 states have internal predecessors, (459), 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 430 [2022-11-23 16:04:00,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:04:00,020 INFO L225 Difference]: With dead ends: 485 [2022-11-23 16:04:00,021 INFO L226 Difference]: Without dead ends: 457 [2022-11-23 16:04:00,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1692 GetRequests, 1238 SyntacticMatches, 0 SemanticMatches, 454 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20837 ImplicationChecksByTransitivity, 79.3s TimeCoverageRelationStatistics Valid=82953, Invalid=124527, Unknown=0, NotChecked=0, Total=207480 [2022-11-23 16:04:00,034 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:04:00,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 16:04:00,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-23 16:04:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 457. [2022-11-23 16:04:00,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.006578947368421) internal successors, (459), 456 states have internal predecessors, (459), 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 16:04:00,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 459 transitions. [2022-11-23 16:04:00,065 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 459 transitions. Word has length 430 [2022-11-23 16:04:00,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:04:00,066 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 459 transitions. [2022-11-23 16:04:00,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 451 states, 451 states have (on average 1.017738359201774) internal successors, (459), 451 states have internal predecessors, (459), 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 16:04:00,068 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 459 transitions. [2022-11-23 16:04:00,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-11-23 16:04:00,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:04:00,080 INFO L195 NwaCegarLoop]: trace histogram [403, 46, 1, 1, 1, 1, 1, 1] [2022-11-23 16:04:00,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 16:04:00,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:04:00,289 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:04:00,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:04:00,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2112936722, now seen corresponding path program 12 times [2022-11-23 16:04:00,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:04:00,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265057228] [2022-11-23 16:04:00,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:04:00,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:04:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:05:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 82487 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-23 16:05:49,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:05:49,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265057228] [2022-11-23 16:05:49,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265057228] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:05:49,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172932755] [2022-11-23 16:05:49,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:05:49,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:05:49,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:05:49,010 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:05:49,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 16:05:50,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:05:50,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:05:50,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 3864 conjuncts, 405 conjunts are in the unsatisfiable core [2022-11-23 16:05:50,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:05:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 82487 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-23 16:05:51,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 82487 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-23 16:09:17,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172932755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:17,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [124621249] [2022-11-23 16:09:17,126 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 16:09:17,127 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:17,127 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:17,127 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:17,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:17,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:17,157 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 16:09:17,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 16:09:17,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:17,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 16:09:17,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:17,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 16:09:17,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:17,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:09:17,268 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 16:09:17,269 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 192 treesize of output 191 [2022-11-23 16:09:17,331 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 16:09:17,371 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:18,898 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17995#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (<= |ULTIMATE.start_main_#t~mem6#1| |ULTIMATE.start_main_~max~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-23 16:09:18,898 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:18,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:18,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 405, 405] total 810 [2022-11-23 16:09:18,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391572726] [2022-11-23 16:09:18,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:18,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2022-11-23 16:09:18,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:18,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2022-11-23 16:09:18,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328471, Invalid=336569, Unknown=0, NotChecked=0, Total=665040 [2022-11-23 16:09:18,971 INFO L87 Difference]: Start difference. First operand 457 states and 459 transitions. Second operand has 811 states, 811 states have (on average 1.0073982737361282) internal successors, (817), 810 states have internal predecessors, (817), 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 16:09:35,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:35,812 INFO L93 Difference]: Finished difference Result 914 states and 1322 transitions. [2022-11-23 16:09:35,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2022-11-23 16:09:35,814 INFO L78 Accepts]: Start accepts. Automaton has has 811 states, 811 states have (on average 1.0073982737361282) internal successors, (817), 810 states have internal predecessors, (817), 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 455 [2022-11-23 16:09:35,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:35,818 INFO L225 Difference]: With dead ends: 914 [2022-11-23 16:09:35,818 INFO L226 Difference]: Without dead ends: 862 [2022-11-23 16:09:35,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1768 GetRequests, 954 SyntacticMatches, 0 SemanticMatches, 814 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7672 ImplicationChecksByTransitivity, 274.8s TimeCoverageRelationStatistics Valid=328471, Invalid=336569, Unknown=0, NotChecked=0, Total=665040 [2022-11-23 16:09:35,847 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:35,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 16:09:35,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-11-23 16:09:35,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 862. [2022-11-23 16:09:35,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 1.0034843205574913) internal successors, (864), 861 states have internal predecessors, (864), 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 16:09:35,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 864 transitions. [2022-11-23 16:09:35,884 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 864 transitions. Word has length 455 [2022-11-23 16:09:35,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:35,885 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 864 transitions. [2022-11-23 16:09:35,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 811 states, 811 states have (on average 1.0073982737361282) internal successors, (817), 810 states have internal predecessors, (817), 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 16:09:35,886 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 864 transitions. [2022-11-23 16:09:35,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 861 [2022-11-23 16:09:35,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:35,894 INFO L195 NwaCegarLoop]: trace histogram [808, 46, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:35,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:36,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f0fade-3941-4185-845b-5fb2ea649b9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 16:09:36,109 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:36,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:36,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1291273039, now seen corresponding path program 13 times [2022-11-23 16:09:36,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:36,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959134459] [2022-11-23 16:09:36,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:36,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat