./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_palindrome_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/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_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_palindrome_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/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_c9d83576-b18f-4582-a4c3-1181a63aa010/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 270a2842345dc5b188d8b64dce3436ccc5910bc1472a41053bc5c00e7f4ceeb6 --- 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 15:33:20,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:33:20,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:33:20,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:33:20,731 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:33:20,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:33:20,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:33:20,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:33:20,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:33:20,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:33:20,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:33:20,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:33:20,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:33:20,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:33:20,762 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:33:20,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:33:20,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:33:20,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:33:20,766 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:33:20,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:33:20,769 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:33:20,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:33:20,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:33:20,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:33:20,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:33:20,791 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:33:20,792 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:33:20,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:33:20,795 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:33:20,796 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:33:20,796 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:33:20,797 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:33:20,799 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:33:20,800 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:33:20,801 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:33:20,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:33:20,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:33:20,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:33:20,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:33:20,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:33:20,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:33:20,806 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:33:20,848 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:33:20,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:33:20,850 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:33:20,850 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:33:20,851 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:33:20,851 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:33:20,851 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:33:20,851 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:33:20,852 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:33:20,852 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:33:20,853 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:33:20,853 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:33:20,853 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:33:20,854 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:33:20,854 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:33:20,854 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:33:20,854 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:33:20,854 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:33:20,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:33:20,855 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:33:20,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:33:20,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:33:20,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:33:20,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:33:20,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:33:20,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:33:20,857 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:33:20,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:33:20,857 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:33:20,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:33:20,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:33:20,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:33:20,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:33:20,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:33:20,859 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:33:20,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:33:20,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:33:20,859 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:33:20,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:33:20,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:33:20,860 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:33:20,861 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_c9d83576-b18f-4582-a4c3-1181a63aa010/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 270a2842345dc5b188d8b64dce3436ccc5910bc1472a41053bc5c00e7f4ceeb6 [2022-11-23 15:33:21,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:33:21,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:33:21,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:33:21,189 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:33:21,190 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:33:21,191 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-examples/standard_palindrome_ground.i [2022-11-23 15:33:24,179 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:33:24,409 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:33:24,410 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/sv-benchmarks/c/array-examples/standard_palindrome_ground.i [2022-11-23 15:33:24,416 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/data/90877d052/267e0a6cee7748d5b6f8ae7783333755/FLAG9cd85e9e5 [2022-11-23 15:33:24,740 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/data/90877d052/267e0a6cee7748d5b6f8ae7783333755 [2022-11-23 15:33:24,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:33:24,745 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:33:24,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:33:24,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:33:24,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:33:24,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:33:24" (1/1) ... [2022-11-23 15:33:24,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71855753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:24, skipping insertion in model container [2022-11-23 15:33:24,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:33:24" (1/1) ... [2022-11-23 15:33:24,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:33:24,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:33:24,924 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_c9d83576-b18f-4582-a4c3-1181a63aa010/sv-benchmarks/c/array-examples/standard_palindrome_ground.i[819,832] [2022-11-23 15:33:24,939 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:33:24,946 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:33:24,959 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_c9d83576-b18f-4582-a4c3-1181a63aa010/sv-benchmarks/c/array-examples/standard_palindrome_ground.i[819,832] [2022-11-23 15:33:24,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:33:24,978 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:33:24,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:24 WrapperNode [2022-11-23 15:33:24,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:33:24,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:33:24,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:33:24,980 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:33:24,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:24" (1/1) ... [2022-11-23 15:33:24,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:24" (1/1) ... [2022-11-23 15:33:25,017 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2022-11-23 15:33:25,017 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:33:25,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:33:25,018 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:33:25,018 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:33:25,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:24" (1/1) ... [2022-11-23 15:33:25,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:24" (1/1) ... [2022-11-23 15:33:25,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:24" (1/1) ... [2022-11-23 15:33:25,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:24" (1/1) ... [2022-11-23 15:33:25,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:24" (1/1) ... [2022-11-23 15:33:25,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:24" (1/1) ... [2022-11-23 15:33:25,044 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:24" (1/1) ... [2022-11-23 15:33:25,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:24" (1/1) ... [2022-11-23 15:33:25,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:33:25,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:33:25,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:33:25,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:33:25,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:24" (1/1) ... [2022-11-23 15:33:25,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:33:25,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:25,087 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:33:25,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:33:25,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:33:25,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:33:25,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:33:25,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:33:25,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:33:25,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:33:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:33:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:33:25,227 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:33:25,230 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:33:25,371 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:33:25,440 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:33:25,443 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 15:33:25,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:33:25 BoogieIcfgContainer [2022-11-23 15:33:25,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:33:25,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:33:25,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:33:25,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:33:25,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:33:24" (1/3) ... [2022-11-23 15:33:25,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da341d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:33:25, skipping insertion in model container [2022-11-23 15:33:25,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:24" (2/3) ... [2022-11-23 15:33:25,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da341d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:33:25, skipping insertion in model container [2022-11-23 15:33:25,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:33:25" (3/3) ... [2022-11-23 15:33:25,480 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_palindrome_ground.i [2022-11-23 15:33:25,506 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:33:25,506 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:33:25,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:33:25,639 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;@25126e91, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:33:25,640 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:33:25,647 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 15:33:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 15:33:25,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:25,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 15:33:25,658 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:25,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:25,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1568606099, now seen corresponding path program 1 times [2022-11-23 15:33:25,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:25,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206485644] [2022-11-23 15:33:25,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:25,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:26,008 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 15:33:26,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:26,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206485644] [2022-11-23 15:33:26,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206485644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:26,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:33:26,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:33:26,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968218058] [2022-11-23 15:33:26,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:26,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:33:26,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:26,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:33:26,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:33:26,071 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 15:33:26,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:26,165 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2022-11-23 15:33:26,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:33:26,167 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 15:33:26,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:26,174 INFO L225 Difference]: With dead ends: 18 [2022-11-23 15:33:26,175 INFO L226 Difference]: Without dead ends: 10 [2022-11-23 15:33:26,177 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 15:33:26,181 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:26,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:33:26,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-23 15:33:26,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-23 15:33:26,233 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 15:33:26,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-23 15:33:26,235 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2022-11-23 15:33:26,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:26,236 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-23 15:33:26,236 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 15:33:26,236 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-23 15:33:26,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 15:33:26,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:26,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:26,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:33:26,238 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:26,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:26,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1672175679, now seen corresponding path program 1 times [2022-11-23 15:33:26,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:26,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170935935] [2022-11-23 15:33:26,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:26,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:26,318 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 15:33:26,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:26,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170935935] [2022-11-23 15:33:26,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170935935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:26,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32825546] [2022-11-23 15:33:26,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:26,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:26,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:26,323 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:26,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:33:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:26,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:33:26,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:26,455 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 15:33:26,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:33:26,478 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 15:33:26,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32825546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:33:26,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1696861949] [2022-11-23 15:33:26,500 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:33:26,500 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:33:26,504 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:33:26,510 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:33:26,510 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:33:26,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:26,625 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:33:26,627 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 15:33:26,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:26,676 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 15:33:26,676 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 15:33:26,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:26,718 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 15:33:26,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:26,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:26,895 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 15:33:26,896 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 186 treesize of output 185 [2022-11-23 15:33:27,097 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 15:33:27,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:27,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-23 15:33:27,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:27,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:27,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:27,220 INFO L321 Elim1Store]: treesize reduction 25, result has 34.2 percent of original size [2022-11-23 15:33:27,221 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 2 case distinctions, treesize of input 66 treesize of output 77 [2022-11-23 15:33:27,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:27,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:27,368 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:33:27,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '104#(and (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 50000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem6#1| (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)))) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:33:27,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:33:27,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:33:27,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 15:33:27,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187626299] [2022-11-23 15:33:27,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:33:27,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:33:27,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:27,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:33:27,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:33:27,523 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 15:33:27,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:27,573 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2022-11-23 15:33:27,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:33:27,575 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 15:33:27,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:27,576 INFO L225 Difference]: With dead ends: 21 [2022-11-23 15:33:27,576 INFO L226 Difference]: Without dead ends: 14 [2022-11-23 15:33:27,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:33:27,584 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:27,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 16 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:33:27,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-23 15:33:27,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-23 15:33:27,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:27,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-23 15:33:27,595 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-11-23 15:33:27,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:27,595 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-23 15:33:27,596 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 15:33:27,596 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-23 15:33:27,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 15:33:27,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:27,597 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:27,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 15:33:27,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-23 15:33:27,805 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:27,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:27,805 INFO L85 PathProgramCache]: Analyzing trace with hash -911663539, now seen corresponding path program 2 times [2022-11-23 15:33:27,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:27,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957855874] [2022-11-23 15:33:27,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:27,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:33:27,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:27,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957855874] [2022-11-23 15:33:27,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957855874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:27,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315904672] [2022-11-23 15:33:27,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:33:27,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:27,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:27,980 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:28,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:33:28,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 15:33:28,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:33:28,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 15:33:28,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:33:28,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:33:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:33:28,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315904672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:33:28,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [644748235] [2022-11-23 15:33:28,137 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:33:28,138 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:33:28,138 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:33:28,139 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:33:28,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:33:28,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:28,186 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:33:28,186 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 15:33:28,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:28,228 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 15:33:28,229 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 15:33:28,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:28,274 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 15:33:28,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:28,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:28,368 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:33:28,368 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 196 treesize of output 184 [2022-11-23 15:33:28,439 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 15:33:28,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:28,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-23 15:33:28,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:28,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:28,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:28,526 INFO L321 Elim1Store]: treesize reduction 25, result has 34.2 percent of original size [2022-11-23 15:33:28,527 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 2 case distinctions, treesize of input 66 treesize of output 77 [2022-11-23 15:33:28,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:28,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:28,634 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:33:28,846 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '241#(and (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 50000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem6#1| (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)))) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:33:28,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:33:28,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:33:28,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-23 15:33:28,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966284497] [2022-11-23 15:33:28,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:33:28,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 15:33:28,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:28,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 15:33:28,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:33:28,849 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 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 15:33:28,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:28,936 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2022-11-23 15:33:28,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 15:33:28,937 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 15:33:28,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:28,941 INFO L225 Difference]: With dead ends: 32 [2022-11-23 15:33:28,941 INFO L226 Difference]: Without dead ends: 24 [2022-11-23 15:33:28,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:33:28,947 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:28,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:33:28,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-23 15:33:28,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-23 15:33:28,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 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 15:33:28,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-11-23 15:33:28,960 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 12 [2022-11-23 15:33:28,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:28,960 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-11-23 15:33:28,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 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 15:33:28,961 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-11-23 15:33:28,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 15:33:28,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:28,961 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:28,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:33:29,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:29,167 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:29,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:29,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1081733229, now seen corresponding path program 3 times [2022-11-23 15:33:29,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:29,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676104197] [2022-11-23 15:33:29,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:29,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:29,520 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 15:33:29,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:29,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676104197] [2022-11-23 15:33:29,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676104197] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:29,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71393688] [2022-11-23 15:33:29,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:33:29,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:29,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:29,522 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:29,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:33:29,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:33:29,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:33:29,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 15:33:29,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:29,652 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 15:33:29,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:33:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 15:33:29,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71393688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:33:29,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [209897580] [2022-11-23 15:33:29,822 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:33:29,822 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:33:29,822 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:33:29,823 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:33:29,823 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:33:29,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:29,859 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 15:33:29,859 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 15:33:29,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:29,871 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 15:33:29,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:29,891 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 15:33:29,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:29,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:29,977 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 15:33:29,978 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 186 treesize of output 185 [2022-11-23 15:33:30,054 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 15:33:30,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:30,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:30,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:30,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:30,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:30,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:30,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 79 [2022-11-23 15:33:30,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:30,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:30,130 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:33:30,254 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '490#(and (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 50000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem6#1| (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)))) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:33:30,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:33:30,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:33:30,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-11-23 15:33:30,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627024596] [2022-11-23 15:33:30,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:33:30,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 15:33:30,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:30,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 15:33:30,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2022-11-23 15:33:30,256 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 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 15:33:30,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:30,333 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-11-23 15:33:30,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 15:33:30,334 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 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 22 [2022-11-23 15:33:30,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:30,335 INFO L225 Difference]: With dead ends: 49 [2022-11-23 15:33:30,335 INFO L226 Difference]: Without dead ends: 35 [2022-11-23 15:33:30,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2022-11-23 15:33:30,336 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:30,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 16 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:33:30,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-23 15:33:30,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-23 15:33:30,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 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 15:33:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-11-23 15:33:30,342 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 22 [2022-11-23 15:33:30,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:30,343 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-11-23 15:33:30,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 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 15:33:30,343 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-11-23 15:33:30,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 15:33:30,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:30,344 INFO L195 NwaCegarLoop]: trace histogram [18, 9, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:30,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:33:30,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:30,550 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:30,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:30,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1003120254, now seen corresponding path program 4 times [2022-11-23 15:33:30,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:30,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569915711] [2022-11-23 15:33:30,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:30,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 15:33:31,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:31,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569915711] [2022-11-23 15:33:31,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569915711] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:31,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763714947] [2022-11-23 15:33:31,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:33:31,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:31,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:31,092 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:31,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:33:31,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:31,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 15:33:31,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 15:33:31,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:33:31,837 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 15:33:31,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763714947] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:33:31,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [228544387] [2022-11-23 15:33:31,843 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:33:31,844 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:33:31,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:33:31,844 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:33:31,844 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:33:31,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:31,876 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 15:33:31,876 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 15:33:31,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:31,887 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 15:33:31,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:31,916 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 15:33:31,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:31,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:31,989 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:33:31,990 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 196 treesize of output 184 [2022-11-23 15:33:32,042 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 15:33:32,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:32,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-23 15:33:32,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:32,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:32,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:32,093 INFO L321 Elim1Store]: treesize reduction 25, result has 34.2 percent of original size [2022-11-23 15:33:32,094 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 2 case distinctions, treesize of input 66 treesize of output 77 [2022-11-23 15:33:32,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:32,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:32,143 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:33:32,522 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '881#(and (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 50000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem6#1| (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)))) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:33:32,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:33:32,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:33:32,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 40 [2022-11-23 15:33:32,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717416681] [2022-11-23 15:33:32,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:33:32,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-23 15:33:32,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:32,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-23 15:33:32,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=1146, Unknown=0, NotChecked=0, Total=1980 [2022-11-23 15:33:32,525 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 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 15:33:32,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:32,749 INFO L93 Difference]: Finished difference Result 80 states and 113 transitions. [2022-11-23 15:33:32,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-23 15:33:32,750 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 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 33 [2022-11-23 15:33:32,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:32,753 INFO L225 Difference]: With dead ends: 80 [2022-11-23 15:33:32,753 INFO L226 Difference]: Without dead ends: 65 [2022-11-23 15:33:32,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 64 SyntacticMatches, 10 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=834, Invalid=1146, Unknown=0, NotChecked=0, Total=1980 [2022-11-23 15:33:32,755 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:32,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 16 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:33:32,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-23 15:33:32,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-23 15:33:32,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 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 15:33:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2022-11-23 15:33:32,781 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 33 [2022-11-23 15:33:32,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:32,782 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2022-11-23 15:33:32,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 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 15:33:32,785 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2022-11-23 15:33:32,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-23 15:33:32,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:32,788 INFO L195 NwaCegarLoop]: trace histogram [38, 19, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:32,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:33:32,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:32,996 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:32,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:32,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1891447522, now seen corresponding path program 5 times [2022-11-23 15:33:32,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:32,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038099212] [2022-11-23 15:33:32,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:32,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-23 15:33:34,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:34,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038099212] [2022-11-23 15:33:34,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038099212] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:34,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358822321] [2022-11-23 15:33:34,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:33:34,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:34,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:34,887 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:34,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:33:53,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-23 15:33:53,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:33:53,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 15:33:53,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2022-11-23 15:33:53,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:33:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2022-11-23 15:33:54,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358822321] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:33:54,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1245679154] [2022-11-23 15:33:54,267 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:33:54,267 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:33:54,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:33:54,268 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:33:54,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:33:54,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,293 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 15:33:54,293 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 15:33:54,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,303 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 15:33:54,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,347 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 15:33:54,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,408 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:33:54,409 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 196 treesize of output 184 [2022-11-23 15:33:54,443 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 15:33:54,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:54,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 79 [2022-11-23 15:33:54,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:54,506 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:33:54,718 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1595#(and (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 50000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem6#1| (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)))) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:33:54,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:33:54,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:33:54,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 22, 22] total 62 [2022-11-23 15:33:54,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427863482] [2022-11-23 15:33:54,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:33:54,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-23 15:33:54,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:54,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-23 15:33:54,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1905, Invalid=2385, Unknown=0, NotChecked=0, Total=4290 [2022-11-23 15:33:54,722 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 62 states, 62 states have (on average 1.435483870967742) internal successors, (89), 62 states have internal predecessors, (89), 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 15:33:55,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:55,170 INFO L93 Difference]: Finished difference Result 151 states and 215 transitions. [2022-11-23 15:33:55,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-23 15:33:55,171 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.435483870967742) internal successors, (89), 62 states have internal predecessors, (89), 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 63 [2022-11-23 15:33:55,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:55,174 INFO L225 Difference]: With dead ends: 151 [2022-11-23 15:33:55,175 INFO L226 Difference]: Without dead ends: 126 [2022-11-23 15:33:55,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1905, Invalid=2385, Unknown=0, NotChecked=0, Total=4290 [2022-11-23 15:33:55,178 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:55,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:33:55,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-23 15:33:55,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-11-23 15:33:55,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 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 15:33:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2022-11-23 15:33:55,202 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 63 [2022-11-23 15:33:55,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:55,202 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2022-11-23 15:33:55,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.435483870967742) internal successors, (89), 62 states have internal predecessors, (89), 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 15:33:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2022-11-23 15:33:55,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 15:33:55,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:55,205 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:55,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:33:55,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:55,430 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:55,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:55,430 INFO L85 PathProgramCache]: Analyzing trace with hash -777425985, now seen corresponding path program 6 times [2022-11-23 15:33:55,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:55,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672148502] [2022-11-23 15:33:55,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:55,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-11-23 15:33:59,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:59,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672148502] [2022-11-23 15:33:59,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672148502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:59,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616615999] [2022-11-23 15:33:59,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:33:59,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:59,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:59,746 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:59,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:34:00,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:34:00,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:34:00,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-23 15:34:00,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:34:00,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-11-23 15:34:00,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:34:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-11-23 15:34:04,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616615999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:34:04,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [136634951] [2022-11-23 15:34:04,921 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:34:04,921 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:34:04,922 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:34:04,922 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:34:04,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:34:04,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:04,950 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:34:04,950 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 15:34:04,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:04,975 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 15:34:04,975 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 15:34:04,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:04,994 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 15:34:05,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:05,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:05,058 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 15:34:05,058 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 186 treesize of output 185 [2022-11-23 15:34:05,120 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 15:34:05,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:05,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-23 15:34:05,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:05,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:05,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:05,164 INFO L321 Elim1Store]: treesize reduction 25, result has 34.2 percent of original size [2022-11-23 15:34:05,165 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 2 case distinctions, treesize of input 66 treesize of output 77 [2022-11-23 15:34:05,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:05,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:05,215 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:34:08,424 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3000#(and (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 50000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem6#1| (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)))) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:34:08,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:34:08,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:34:08,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 122 [2022-11-23 15:34:08,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104433574] [2022-11-23 15:34:08,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:34:08,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-23 15:34:08,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:08,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-23 15:34:08,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7517, Invalid=8485, Unknown=0, NotChecked=0, Total=16002 [2022-11-23 15:34:08,436 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand has 123 states, 123 states have (on average 1.048780487804878) internal successors, (129), 122 states have internal predecessors, (129), 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 15:34:09,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:09,671 INFO L93 Difference]: Finished difference Result 253 states and 318 transitions. [2022-11-23 15:34:09,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-11-23 15:34:09,672 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.048780487804878) internal successors, (129), 122 states have internal predecessors, (129), 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 124 [2022-11-23 15:34:09,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:09,673 INFO L225 Difference]: With dead ends: 253 [2022-11-23 15:34:09,673 INFO L226 Difference]: Without dead ends: 188 [2022-11-23 15:34:09,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 246 SyntacticMatches, 60 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11756 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=7517, Invalid=8485, Unknown=0, NotChecked=0, Total=16002 [2022-11-23 15:34:09,678 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:09,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 36 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:34:09,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-23 15:34:09,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-11-23 15:34:09,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0160427807486632) internal successors, (190), 187 states have internal predecessors, (190), 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 15:34:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 190 transitions. [2022-11-23 15:34:09,694 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 190 transitions. Word has length 124 [2022-11-23 15:34:09,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:09,695 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 190 transitions. [2022-11-23 15:34:09,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.048780487804878) internal successors, (129), 122 states have internal predecessors, (129), 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 15:34:09,695 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 190 transitions. [2022-11-23 15:34:09,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-11-23 15:34:09,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:09,698 INFO L195 NwaCegarLoop]: trace histogram [120, 60, 1, 1, 1, 1, 1, 1] [2022-11-23 15:34:09,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-23 15:34:09,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:34:09,904 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:34:09,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:09,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1396412589, now seen corresponding path program 7 times [2022-11-23 15:34:09,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:09,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891313720] [2022-11-23 15:34:09,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:09,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9090 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2022-11-23 15:34:21,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:34:21,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891313720] [2022-11-23 15:34:21,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891313720] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:34:21,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122866339] [2022-11-23 15:34:21,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:34:21,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:34:21,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:34:21,747 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:34:21,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:34:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:22,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 1553 conjuncts, 122 conjunts are in the unsatisfiable core [2022-11-23 15:34:22,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:34:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9090 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2022-11-23 15:34:22,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:34:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9090 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2022-11-23 15:34:39,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122866339] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:34:39,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1952360557] [2022-11-23 15:34:39,972 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:34:39,972 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:34:39,972 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:34:39,973 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:34:39,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:34:39,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:39,999 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:34:40,000 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 15:34:40,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:40,023 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 15:34:40,024 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 15:34:40,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:40,040 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 15:34:40,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:40,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:40,117 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 15:34:40,117 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 186 treesize of output 185 [2022-11-23 15:34:40,189 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 15:34:40,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:40,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-23 15:34:40,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:40,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:40,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:40,234 INFO L321 Elim1Store]: treesize reduction 25, result has 34.2 percent of original size [2022-11-23 15:34:40,234 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 2 case distinctions, treesize of input 66 treesize of output 77 [2022-11-23 15:34:40,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:40,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:40,275 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:34:45,914 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5227#(and (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 50000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem6#1| (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)))) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:34:45,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:34:45,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:34:45,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122, 122] total 244 [2022-11-23 15:34:45,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455357132] [2022-11-23 15:34:45,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:34:45,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 245 states [2022-11-23 15:34:45,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:45,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 245 interpolants. [2022-11-23 15:34:45,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29904, Invalid=31848, Unknown=0, NotChecked=0, Total=61752 [2022-11-23 15:34:45,933 INFO L87 Difference]: Start difference. First operand 188 states and 190 transitions. Second operand has 245 states, 245 states have (on average 1.0244897959183674) internal successors, (251), 244 states have internal predecessors, (251), 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 15:34:54,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:54,185 INFO L93 Difference]: Finished difference Result 437 states and 623 transitions. [2022-11-23 15:34:54,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 244 states. [2022-11-23 15:34:54,187 INFO L78 Accepts]: Start accepts. Automaton has has 245 states, 245 states have (on average 1.0244897959183674) internal successors, (251), 244 states have internal predecessors, (251), 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 186 [2022-11-23 15:34:54,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:54,189 INFO L225 Difference]: With dead ends: 437 [2022-11-23 15:34:54,189 INFO L226 Difference]: Without dead ends: 371 [2022-11-23 15:34:54,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 370 SyntacticMatches, 61 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24075 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=29904, Invalid=31848, Unknown=0, NotChecked=0, Total=61752 [2022-11-23 15:34:54,195 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 42 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 904 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 904 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:54,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [904 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 15:34:54,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-11-23 15:34:54,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2022-11-23 15:34:54,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.008108108108108) internal successors, (373), 370 states have internal predecessors, (373), 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 15:34:54,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 373 transitions. [2022-11-23 15:34:54,222 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 373 transitions. Word has length 186 [2022-11-23 15:34:54,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:54,222 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 373 transitions. [2022-11-23 15:34:54,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 245 states, 245 states have (on average 1.0244897959183674) internal successors, (251), 244 states have internal predecessors, (251), 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 15:34:54,223 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 373 transitions. [2022-11-23 15:34:54,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-11-23 15:34:54,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:54,228 INFO L195 NwaCegarLoop]: trace histogram [242, 121, 1, 1, 1, 1, 1, 1] [2022-11-23 15:34:54,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:34:54,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 15:34:54,442 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:34:54,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:54,442 INFO L85 PathProgramCache]: Analyzing trace with hash -170910338, now seen corresponding path program 8 times [2022-11-23 15:34:54,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:54,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142016397] [2022-11-23 15:34:54,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:54,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:35:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 36784 backedges. 0 proven. 29403 refuted. 0 times theorem prover too weak. 7381 trivial. 0 not checked. [2022-11-23 15:35:34,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:35:34,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142016397] [2022-11-23 15:35:34,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142016397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:35:34,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572640203] [2022-11-23 15:35:34,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:35:34,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:35:34,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:35:34,879 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:35:34,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d83576-b18f-4582-a4c3-1181a63aa010/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process