./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy7_ground-2.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_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/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_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy7_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/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_e8e94deb-a577-41e3-a035-15186a0b3f34/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 cbf527dd3c93b1481b5a3e05c502e53db8f02c4e20ad58a12006bf35717e53d7 --- 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 15:16:54,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:16:54,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:16:54,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:16:54,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:16:54,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:16:54,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:16:54,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:16:54,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:16:54,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:16:54,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:16:54,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:16:54,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:16:54,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:16:54,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:16:54,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:16:54,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:16:54,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:16:55,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:16:55,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:16:55,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:16:55,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:16:55,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:16:55,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:16:55,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:16:55,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:16:55,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:16:55,023 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:16:55,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:16:55,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:16:55,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:16:55,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:16:55,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:16:55,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:16:55,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:16:55,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:16:55,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:16:55,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:16:55,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:16:55,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:16:55,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:16:55,045 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:16:55,092 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:16:55,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:16:55,093 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:16:55,093 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:16:55,094 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:16:55,094 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:16:55,094 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:16:55,094 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:16:55,095 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:16:55,095 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:16:55,096 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:16:55,096 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:16:55,096 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:16:55,097 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:16:55,097 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:16:55,097 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:16:55,097 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:16:55,097 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:16:55,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:16:55,098 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:16:55,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:16:55,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:16:55,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:16:55,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:16:55,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:16:55,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:16:55,100 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:16:55,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:16:55,101 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:16:55,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:16:55,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:16:55,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:16:55,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:16:55,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:16:55,102 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:16:55,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:16:55,102 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:16:55,103 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:16:55,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:16:55,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:16:55,103 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:16:55,103 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_e8e94deb-a577-41e3-a035-15186a0b3f34/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cbf527dd3c93b1481b5a3e05c502e53db8f02c4e20ad58a12006bf35717e53d7 [2022-11-23 15:16:55,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:16:55,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:16:55,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:16:55,498 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:16:55,499 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:16:55,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-examples/standard_copy7_ground-2.i [2022-11-23 15:16:58,532 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:16:58,731 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:16:58,732 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/sv-benchmarks/c/array-examples/standard_copy7_ground-2.i [2022-11-23 15:16:58,739 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/data/9ff1f978e/d06d86f754a442789c1f2733994ce8c8/FLAGd4464cf49 [2022-11-23 15:16:58,754 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/data/9ff1f978e/d06d86f754a442789c1f2733994ce8c8 [2022-11-23 15:16:58,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:16:58,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:16:58,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:16:58,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:16:58,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:16:58,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:16:58" (1/1) ... [2022-11-23 15:16:58,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12013d3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:58, skipping insertion in model container [2022-11-23 15:16:58,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:16:58" (1/1) ... [2022-11-23 15:16:58,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:16:58,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:16:58,977 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_e8e94deb-a577-41e3-a035-15186a0b3f34/sv-benchmarks/c/array-examples/standard_copy7_ground-2.i[816,829] [2022-11-23 15:16:58,996 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:16:59,005 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:16:59,017 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_e8e94deb-a577-41e3-a035-15186a0b3f34/sv-benchmarks/c/array-examples/standard_copy7_ground-2.i[816,829] [2022-11-23 15:16:59,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:16:59,042 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:16:59,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:59 WrapperNode [2022-11-23 15:16:59,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:16:59,044 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:16:59,044 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:16:59,044 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:16:59,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:59" (1/1) ... [2022-11-23 15:16:59,059 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:59" (1/1) ... [2022-11-23 15:16:59,081 INFO L138 Inliner]: procedures = 16, calls = 48, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 160 [2022-11-23 15:16:59,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:16:59,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:16:59,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:16:59,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:16:59,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:59" (1/1) ... [2022-11-23 15:16:59,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:59" (1/1) ... [2022-11-23 15:16:59,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:59" (1/1) ... [2022-11-23 15:16:59,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:59" (1/1) ... [2022-11-23 15:16:59,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:59" (1/1) ... [2022-11-23 15:16:59,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:59" (1/1) ... [2022-11-23 15:16:59,107 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:59" (1/1) ... [2022-11-23 15:16:59,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:59" (1/1) ... [2022-11-23 15:16:59,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:16:59,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:16:59,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:16:59,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:16:59,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:59" (1/1) ... [2022-11-23 15:16:59,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:16:59,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:16:59,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:16:59,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:16:59,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:16:59,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:16:59,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:16:59,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:16:59,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:16:59,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:16:59,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:16:59,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:16:59,314 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:16:59,317 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:16:59,650 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:16:59,750 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:16:59,753 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-23 15:16:59,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:16:59 BoogieIcfgContainer [2022-11-23 15:16:59,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:16:59,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:16:59,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:16:59,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:16:59,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:16:58" (1/3) ... [2022-11-23 15:16:59,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d456d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:16:59, skipping insertion in model container [2022-11-23 15:16:59,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:59" (2/3) ... [2022-11-23 15:16:59,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d456d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:16:59, skipping insertion in model container [2022-11-23 15:16:59,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:16:59" (3/3) ... [2022-11-23 15:16:59,769 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-2.i [2022-11-23 15:16:59,789 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:16:59,789 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:16:59,842 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:16:59,848 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;@4be93ed7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:16:59,848 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:16:59,857 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:16:59,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 15:16:59,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:16:59,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:16:59,870 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:16:59,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:16:59,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1105021150, now seen corresponding path program 1 times [2022-11-23 15:16:59,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:16:59,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758551714] [2022-11-23 15:16:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:16:59,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:00,283 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 15:17:00,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:17:00,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758551714] [2022-11-23 15:17:00,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758551714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:17:00,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:17:00,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:17:00,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491179699] [2022-11-23 15:17:00,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:17:00,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:17:00,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:17:00,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:17:00,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:17:00,332 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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 15:17:00,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:17:00,457 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2022-11-23 15:17:00,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:17:00,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 15:17:00,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:17:00,477 INFO L225 Difference]: With dead ends: 29 [2022-11-23 15:17:00,481 INFO L226 Difference]: Without dead ends: 15 [2022-11-23 15:17:00,484 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 15:17:00,488 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:17:00,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:17:00,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-23 15:17:00,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-23 15:17:00,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 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 15:17:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 23 transitions. [2022-11-23 15:17:00,522 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 23 transitions. Word has length 12 [2022-11-23 15:17:00,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:17:00,522 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 23 transitions. [2022-11-23 15:17:00,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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 15:17:00,523 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 23 transitions. [2022-11-23 15:17:00,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 15:17:00,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:00,524 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:17:00,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:17:00,524 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:17:00,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:00,525 INFO L85 PathProgramCache]: Analyzing trace with hash -390840427, now seen corresponding path program 1 times [2022-11-23 15:17:00,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:00,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034914156] [2022-11-23 15:17:00,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:00,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:17:00,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:17:00,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034914156] [2022-11-23 15:17:00,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034914156] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:17:00,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914922278] [2022-11-23 15:17:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:00,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:17:00,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:17:00,692 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:17:00,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:17:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:00,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:17:00,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:17:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:17:00,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:17:00,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914922278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:17:00,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:17:00,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-23 15:17:00,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778961554] [2022-11-23 15:17:00,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:17:00,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:17:00,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:17:00,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:17:00,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:17:00,867 INFO L87 Difference]: Start difference. First operand 15 states and 23 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 15:17:00,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:17:00,922 INFO L93 Difference]: Finished difference Result 33 states and 54 transitions. [2022-11-23 15:17:00,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:17:00,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 13 [2022-11-23 15:17:00,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:17:00,923 INFO L225 Difference]: With dead ends: 33 [2022-11-23 15:17:00,923 INFO L226 Difference]: Without dead ends: 22 [2022-11-23 15:17:00,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:17:00,925 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:17:00,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:17:00,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-23 15:17:00,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-23 15:17:00,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:00,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2022-11-23 15:17:00,932 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2022-11-23 15:17:00,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:17:00,932 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2022-11-23 15:17:00,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 15:17:00,932 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2022-11-23 15:17:00,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 15:17:00,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:00,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:17:00,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:17:01,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:17:01,140 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:17:01,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:01,141 INFO L85 PathProgramCache]: Analyzing trace with hash -626731024, now seen corresponding path program 1 times [2022-11-23 15:17:01,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:01,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98528195] [2022-11-23 15:17:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:01,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 15:17:01,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:17:01,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98528195] [2022-11-23 15:17:01,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98528195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:17:01,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082481330] [2022-11-23 15:17:01,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:01,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:17:01,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:17:01,317 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:17:01,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:17:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:01,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:17:01,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:17:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 15:17:01,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:17:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 15:17:01,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082481330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:17:01,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1907959686] [2022-11-23 15:17:01,553 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 15:17:01,553 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:17:01,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:17:01,562 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:17:01,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:17:01,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:01,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:01,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:01,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:01,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:01,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:01,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:01,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:02,555 INFO L321 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-11-23 15:17:02,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-11-23 15:17:02,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:02,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:02,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:02,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:02,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:02,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:02,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:02,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:02,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 53 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 57 [2022-11-23 15:17:02,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:02,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 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 15:17:03,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:03,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:03,689 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 15:17:03,690 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 746 treesize of output 745 [2022-11-23 15:17:04,548 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 15:17:04,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:04,597 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:04,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:04,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:04,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:04,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:04,690 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:04,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:04,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:04,764 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:04,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:04,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:04,801 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:04,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:04,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:04,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:04,875 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:04,876 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 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:04,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:04,961 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:04,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:04,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:05,003 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:05,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:05,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:05,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:05,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:05,080 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:05,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:05,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:05,152 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:05,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:05,197 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:17:05,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:17:05,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:05,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:05,317 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:17:05,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-23 15:17:05,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:05,476 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:05,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:05,544 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:17:05,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:17:05,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:05,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:05,667 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:17:05,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2022-11-23 15:17:05,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:05,806 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:05,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:05,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:05,844 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:05,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:05,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:05,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:05,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:05,921 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:05,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:05,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:05,987 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:05,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:06,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:06,023 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:06,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:06,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:06,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:06,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:06,095 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:06,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:06,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:06,155 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:06,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:06,179 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:17:06,545 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '351#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem18#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem19#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:17:06,545 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:17:06,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:17:06,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 15:17:06,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387227843] [2022-11-23 15:17:06,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:17:06,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:17:06,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:17:06,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:17:06,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:17:06,548 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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 15:17:06,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:17:06,610 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2022-11-23 15:17:06,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:17:06,612 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-23 15:17:06,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:17:06,612 INFO L225 Difference]: With dead ends: 44 [2022-11-23 15:17:06,613 INFO L226 Difference]: Without dead ends: 25 [2022-11-23 15:17:06,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:17:06,614 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:17:06,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:17:06,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-23 15:17:06,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-23 15:17:06,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 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 15:17:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2022-11-23 15:17:06,619 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 20 [2022-11-23 15:17:06,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:17:06,620 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2022-11-23 15:17:06,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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 15:17:06,620 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2022-11-23 15:17:06,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 15:17:06,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:06,621 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:17:06,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 15:17:06,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-23 15:17:06,827 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:17:06,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:06,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1362752313, now seen corresponding path program 2 times [2022-11-23 15:17:06,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:06,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686305090] [2022-11-23 15:17:06,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:06,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:17:06,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:17:06,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686305090] [2022-11-23 15:17:06,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686305090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:17:06,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449427077] [2022-11-23 15:17:06,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:17:06,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:17:06,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:17:06,976 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:17:06,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:17:07,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 15:17:07,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:17:07,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:17:07,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:17:07,128 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:17:07,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:17:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:17:07,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449427077] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:17:07,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [625876824] [2022-11-23 15:17:07,147 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 15:17:07,147 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:17:07,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:17:07,148 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:17:07,148 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:17:07,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:07,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:07,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:07,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:07,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:07,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:07,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:07,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:07,801 INFO L321 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-11-23 15:17:07,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-11-23 15:17:07,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:07,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:07,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:07,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:07,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:07,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:07,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:07,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:07,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 53 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 57 [2022-11-23 15:17:08,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:08,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 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 15:17:08,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:08,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:08,430 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:17:08,431 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 756 treesize of output 744 [2022-11-23 15:17:08,715 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 15:17:08,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:08,751 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:08,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:08,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:08,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:08,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:08,817 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:08,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:08,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:08,900 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:08,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:08,935 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:17:08,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:17:08,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:08,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:09,037 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:17:09,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2022-11-23 15:17:09,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:09,142 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:09,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:09,174 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:17:09,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:17:09,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:09,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:09,270 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:17:09,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-23 15:17:09,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:09,371 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:09,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:09,403 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:17:09,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:17:09,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:09,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:09,492 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:17:09,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-23 15:17:09,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:09,573 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:09,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:09,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:09,626 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:09,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:09,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:09,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:09,681 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:09,682 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 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:09,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:09,736 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:09,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:09,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:09,769 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:09,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:09,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:09,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:09,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:09,829 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:09,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:09,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:09,882 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:09,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:09,911 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:17:09,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:17:09,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:09,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:10,016 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:17:10,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-23 15:17:10,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:10,124 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:10,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:10,144 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:17:10,459 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '619#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem18#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem19#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:17:10,459 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:17:10,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:17:10,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 15:17:10,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506103787] [2022-11-23 15:17:10,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:17:10,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:17:10,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:17:10,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:17:10,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:17:10,461 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:10,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:17:10,601 INFO L93 Difference]: Finished difference Result 63 states and 98 transitions. [2022-11-23 15:17:10,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:17:10,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-23 15:17:10,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:17:10,603 INFO L225 Difference]: With dead ends: 63 [2022-11-23 15:17:10,603 INFO L226 Difference]: Without dead ends: 46 [2022-11-23 15:17:10,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:17:10,605 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:17:10,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:17:10,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-23 15:17:10,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-23 15:17:10,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-11-23 15:17:10,619 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 23 [2022-11-23 15:17:10,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:17:10,619 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-11-23 15:17:10,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:10,620 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-11-23 15:17:10,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-23 15:17:10,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:10,622 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:17:10,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-23 15:17:10,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:17:10,828 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:17:10,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:10,828 INFO L85 PathProgramCache]: Analyzing trace with hash -269011234, now seen corresponding path program 3 times [2022-11-23 15:17:10,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:10,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555144584] [2022-11-23 15:17:10,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:10,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-23 15:17:11,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:17:11,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555144584] [2022-11-23 15:17:11,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555144584] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:17:11,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113967615] [2022-11-23 15:17:11,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:17:11,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:17:11,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:17:11,048 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:17:11,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:17:11,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:17:11,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:17:11,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:17:11,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:17:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-23 15:17:11,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:17:11,301 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-23 15:17:11,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113967615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:17:11,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [495635740] [2022-11-23 15:17:11,306 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 15:17:11,307 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:17:11,307 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:17:11,307 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:17:11,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:17:11,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:11,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:11,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:11,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:11,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:11,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:11,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:11,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:11,747 INFO L321 Elim1Store]: treesize reduction 703, result has 8.6 percent of original size [2022-11-23 15:17:11,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 17 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 82 [2022-11-23 15:17:11,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:11,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:11,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:11,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:11,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:11,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:11,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:11,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:12,370 INFO L321 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-11-23 15:17:12,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-11-23 15:17:12,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:12,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 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 15:17:12,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:12,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:12,904 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 15:17:12,905 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 746 treesize of output 745 [2022-11-23 15:17:13,453 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 15:17:13,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:13,491 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:13,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:13,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:13,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:13,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:13,575 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:13,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:13,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:13,637 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:13,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:13,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:13,669 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:13,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:13,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:13,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:13,729 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:13,730 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 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:13,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:13,787 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:13,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:13,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:13,818 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:13,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:13,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:13,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:13,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:13,881 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:13,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:13,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:13,932 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:13,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:13,960 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:17:13,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:17:14,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:14,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:14,049 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:17:14,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2022-11-23 15:17:14,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:14,145 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:14,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:14,180 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:17:14,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:17:14,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:14,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:14,279 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:17:14,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-23 15:17:14,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:14,359 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:14,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:14,389 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:17:14,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:17:14,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:14,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:14,506 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:17:14,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-23 15:17:14,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:14,579 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:14,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:14,609 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:17:14,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:17:14,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:14,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:14,698 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:17:14,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-23 15:17:14,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:14,796 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:14,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:14,816 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:17:15,141 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1099#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem18#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem19#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:17:15,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:17:15,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:17:15,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 15:17:15,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282180316] [2022-11-23 15:17:15,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:17:15,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 15:17:15,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:17:15,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 15:17:15,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-23 15:17:15,144 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:15,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:17:15,250 INFO L93 Difference]: Finished difference Result 92 states and 113 transitions. [2022-11-23 15:17:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:17:15,251 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-23 15:17:15,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:17:15,252 INFO L225 Difference]: With dead ends: 92 [2022-11-23 15:17:15,252 INFO L226 Difference]: Without dead ends: 52 [2022-11-23 15:17:15,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-23 15:17:15,253 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:17:15,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:17:15,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-23 15:17:15,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-23 15:17:15,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 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 15:17:15,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-11-23 15:17:15,262 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 44 [2022-11-23 15:17:15,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:17:15,262 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-11-23 15:17:15,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:15,262 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-11-23 15:17:15,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-23 15:17:15,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:15,264 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:17:15,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-23 15:17:15,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:17:15,469 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:17:15,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:15,469 INFO L85 PathProgramCache]: Analyzing trace with hash -644312194, now seen corresponding path program 4 times [2022-11-23 15:17:15,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:15,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675992710] [2022-11-23 15:17:15,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:15,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:15,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-23 15:17:15,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:17:15,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675992710] [2022-11-23 15:17:15,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675992710] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:17:15,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332876369] [2022-11-23 15:17:15,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:17:15,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:17:15,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:17:15,865 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:17:15,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:17:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:16,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 15:17:16,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:17:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-23 15:17:16,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:17:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-23 15:17:16,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332876369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:17:16,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2135646376] [2022-11-23 15:17:16,319 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 15:17:16,319 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:17:16,319 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:17:16,320 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:17:16,320 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:17:16,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:16,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:16,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:16,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:16,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:16,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:16,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:16,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:16,920 INFO L321 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-11-23 15:17:16,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-11-23 15:17:16,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:16,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:16,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:16,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:16,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:16,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:16,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:16,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:16,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 53 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 57 [2022-11-23 15:17:17,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:17,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 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 15:17:17,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:17,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:17,513 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 15:17:17,514 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 746 treesize of output 745 [2022-11-23 15:17:17,960 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 15:17:17,990 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:17:17,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:17:18,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:18,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:18,085 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:17:18,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-23 15:17:18,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:18,187 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:18,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:18,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:18,217 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:18,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:18,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:18,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:18,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:18,273 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:18,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:18,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:18,332 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:18,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:18,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:18,365 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:18,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:18,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:18,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:18,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:18,423 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:18,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:18,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:18,478 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:18,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:18,507 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:17:18,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:17:18,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:18,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:18,605 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:17:18,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2022-11-23 15:17:18,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:18,679 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:18,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:18,710 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:17:18,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:17:18,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:18,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:18,823 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:17:18,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2022-11-23 15:17:18,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:18,907 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:18,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:18,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:18,941 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:18,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:19,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:19,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:19,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:19,029 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:19,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:19,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:19,077 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:19,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:19,107 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:17:19,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:17:19,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:19,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:19,186 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:17:19,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2022-11-23 15:17:19,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:19,270 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:19,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:19,290 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:17:19,623 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1697#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem18#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem19#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:17:19,623 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:17:19,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:17:19,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-23 15:17:19,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861325690] [2022-11-23 15:17:19,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:17:19,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 15:17:19,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:17:19,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 15:17:19,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-23 15:17:19,626 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:19,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:17:19,745 INFO L93 Difference]: Finished difference Result 104 states and 131 transitions. [2022-11-23 15:17:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 15:17:19,746 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-23 15:17:19,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:17:19,749 INFO L225 Difference]: With dead ends: 104 [2022-11-23 15:17:19,749 INFO L226 Difference]: Without dead ends: 64 [2022-11-23 15:17:19,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-23 15:17:19,751 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:17:19,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:17:19,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-23 15:17:19,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-11-23 15:17:19,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 63 states have internal predecessors, (72), 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 15:17:19,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-11-23 15:17:19,764 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 50 [2022-11-23 15:17:19,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:17:19,765 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-11-23 15:17:19,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:17:19,765 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-11-23 15:17:19,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-23 15:17:19,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:19,768 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:17:19,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:17:19,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 15:17:19,975 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:17:19,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:19,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1140497218, now seen corresponding path program 5 times [2022-11-23 15:17:19,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:19,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045487432] [2022-11-23 15:17:19,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:19,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-23 15:17:20,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:17:20,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045487432] [2022-11-23 15:17:20,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045487432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:17:20,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442806241] [2022-11-23 15:17:20,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:17:20,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:17:20,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:17:20,767 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:17:20,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:17:21,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 15:17:21,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:17:21,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:17:21,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:17:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-11-23 15:17:21,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:17:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-11-23 15:17:21,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442806241] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:17:21,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [867501906] [2022-11-23 15:17:21,444 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 15:17:21,444 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:17:21,444 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:17:21,444 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:17:21,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:17:21,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:21,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:21,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:21,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:21,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:21,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:21,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:21,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:22,016 INFO L321 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-11-23 15:17:22,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-11-23 15:17:22,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:22,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:22,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:22,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:22,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:22,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:22,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:22,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:22,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 53 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 57 [2022-11-23 15:17:22,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:22,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 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 15:17:22,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:22,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:22,650 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 15:17:22,651 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 746 treesize of output 745 [2022-11-23 15:17:23,241 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 15:17:23,283 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:17:23,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:17:23,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:23,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:23,387 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:17:23,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2022-11-23 15:17:23,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:23,471 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:23,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:23,496 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:17:23,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:17:23,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:23,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:23,589 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:17:23,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-23 15:17:23,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:23,720 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:23,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:23,749 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:17:23,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:17:23,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:23,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:23,852 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:17:23,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-23 15:17:23,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:23,930 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:23,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:23,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:23,960 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:23,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:23,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:23,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:23,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:24,007 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:24,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:24,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:24,084 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:24,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:24,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:24,135 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:24,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:24,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:24,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:24,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:24,185 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:24,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:24,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:24,253 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:24,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:24,284 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:17:24,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:17:24,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:24,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:24,389 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:17:24,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-23 15:17:24,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:24,494 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:24,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:24,531 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:17:24,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:17:24,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:24,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:24,618 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:17:24,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2022-11-23 15:17:24,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:24,683 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:24,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:24,706 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:17:25,391 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2425#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem18#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem19#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:17:25,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:17:25,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:17:25,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-23 15:17:25,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299820082] [2022-11-23 15:17:25,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:17:25,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 15:17:25,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:17:25,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 15:17:25,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 15:17:25,394 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 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 15:17:25,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:17:25,668 INFO L93 Difference]: Finished difference Result 147 states and 205 transitions. [2022-11-23 15:17:25,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-23 15:17:25,673 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 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 62 [2022-11-23 15:17:25,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:17:25,674 INFO L225 Difference]: With dead ends: 147 [2022-11-23 15:17:25,674 INFO L226 Difference]: Without dead ends: 107 [2022-11-23 15:17:25,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 165 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 15:17:25,676 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:17:25,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:17:25,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-23 15:17:25,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-11-23 15:17:25,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0849056603773586) internal successors, (115), 106 states have internal predecessors, (115), 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 15:17:25,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2022-11-23 15:17:25,687 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 62 [2022-11-23 15:17:25,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:17:25,687 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2022-11-23 15:17:25,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 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 15:17:25,688 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2022-11-23 15:17:25,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-23 15:17:25,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:25,689 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:17:25,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:17:25,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 15:17:25,896 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:17:25,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:25,896 INFO L85 PathProgramCache]: Analyzing trace with hash -603243691, now seen corresponding path program 6 times [2022-11-23 15:17:25,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:25,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866323391] [2022-11-23 15:17:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:25,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-11-23 15:17:26,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:17:26,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866323391] [2022-11-23 15:17:26,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866323391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:17:26,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001022246] [2022-11-23 15:17:26,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:17:26,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:17:26,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:17:26,993 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:17:27,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:17:27,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:17:27,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:17:27,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 15:17:27,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:17:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-11-23 15:17:27,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:17:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-11-23 15:17:28,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001022246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:17:28,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1207037889] [2022-11-23 15:17:28,219 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 15:17:28,219 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:17:28,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:17:28,220 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:17:28,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:17:28,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:28,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:28,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:28,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:28,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:28,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:28,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:28,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:28,609 INFO L321 Elim1Store]: treesize reduction 703, result has 8.6 percent of original size [2022-11-23 15:17:28,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 17 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 82 [2022-11-23 15:17:28,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:28,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:28,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:28,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:28,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:28,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:28,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:28,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:29,245 INFO L321 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-11-23 15:17:29,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-11-23 15:17:29,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:29,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 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 15:17:29,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:29,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:29,655 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:17:29,656 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 756 treesize of output 744 [2022-11-23 15:17:29,935 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 15:17:29,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:29,969 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:29,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:30,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:30,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,025 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:30,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:30,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,073 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:30,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:30,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,101 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:30,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:30,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:30,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,157 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:30,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:30,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,205 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:30,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:30,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,237 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:30,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:30,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:30,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,288 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:30,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:30,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,345 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:30,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:30,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,376 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:30,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:30,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:30,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,428 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:30,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:30,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,495 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:30,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:30,570 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:17:30,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:17:30,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,654 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:17:30,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-23 15:17:30,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,727 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:30,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:30,755 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:17:30,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:17:30,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,841 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:17:30,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-23 15:17:30,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,923 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:30,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:30,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,951 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:30,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:30,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:30,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:30,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:31,004 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:31,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:31,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:31,052 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:31,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:31,073 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:17:31,993 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3599#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem18#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem19#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:17:31,993 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:17:31,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:17:31,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-23 15:17:31,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135757306] [2022-11-23 15:17:31,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:17:31,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-23 15:17:31,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:17:31,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-23 15:17:31,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-23 15:17:31,996 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand has 51 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 50 states have internal predecessors, (69), 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 15:17:32,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:17:32,154 INFO L93 Difference]: Finished difference Result 214 states and 254 transitions. [2022-11-23 15:17:32,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-23 15:17:32,155 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 50 states have internal predecessors, (69), 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 105 [2022-11-23 15:17:32,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:17:32,156 INFO L225 Difference]: With dead ends: 214 [2022-11-23 15:17:32,156 INFO L226 Difference]: Without dead ends: 132 [2022-11-23 15:17:32,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 273 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-23 15:17:32,158 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:17:32,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:17:32,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-23 15:17:32,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-11-23 15:17:32,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0687022900763359) internal successors, (140), 131 states have internal predecessors, (140), 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 15:17:32,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 140 transitions. [2022-11-23 15:17:32,170 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 140 transitions. Word has length 105 [2022-11-23 15:17:32,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:17:32,170 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 140 transitions. [2022-11-23 15:17:32,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 50 states have internal predecessors, (69), 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 15:17:32,170 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 140 transitions. [2022-11-23 15:17:32,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 15:17:32,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:32,173 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:17:32,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-23 15:17:32,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:17:32,380 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:17:32,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:32,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1766510978, now seen corresponding path program 7 times [2022-11-23 15:17:32,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:32,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995974178] [2022-11-23 15:17:32,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:32,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1561 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-11-23 15:17:35,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:17:35,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995974178] [2022-11-23 15:17:35,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995974178] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:17:35,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632909130] [2022-11-23 15:17:35,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:17:35,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:17:35,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:17:35,385 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:17:35,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:17:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:35,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-23 15:17:35,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:17:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1561 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-11-23 15:17:35,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:17:38,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1561 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-11-23 15:17:38,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632909130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:17:38,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [205039873] [2022-11-23 15:17:38,997 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 15:17:38,997 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:17:38,998 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:17:38,998 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:17:38,998 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:17:39,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:39,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:39,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:39,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:39,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:39,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:39,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:39,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:39,620 INFO L321 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-11-23 15:17:39,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-11-23 15:17:39,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:39,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:39,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:39,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:39,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:39,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:39,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:39,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:39,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 53 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 57 [2022-11-23 15:17:39,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:39,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 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 15:17:40,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:40,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:40,053 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 15:17:40,054 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 746 treesize of output 745 [2022-11-23 15:17:40,454 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 15:17:40,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:40,484 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:40,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:40,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:40,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:40,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:40,536 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:40,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:40,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:40,588 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:40,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:40,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:40,616 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:40,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:40,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:40,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:40,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:40,676 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:40,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:40,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:40,726 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:40,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:40,755 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:17:40,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:17:40,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:40,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:40,869 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:17:40,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-23 15:17:40,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:40,967 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:40,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:40,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:40,997 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:40,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:41,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:41,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:41,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:41,045 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:41,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:41,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:41,114 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:41,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:41,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:41,161 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:41,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:41,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:41,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:41,212 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:41,213 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 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:41,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:41,265 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:41,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:41,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:41,296 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:41,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:41,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:41,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:41,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:41,352 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:41,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:41,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:41,413 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:41,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:41,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:41,443 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:41,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:41,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:41,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:41,498 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:17:41,498 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 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:17:41,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:41,545 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:17:41,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:17:41,565 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:17:42,946 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5157#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem18#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem19#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:17:42,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:17:42,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:17:42,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-23 15:17:42,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027377871] [2022-11-23 15:17:42,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:17:42,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-23 15:17:42,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:17:42,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-23 15:17:42,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-23 15:17:42,952 INFO L87 Difference]: Start difference. First operand 132 states and 140 transitions. Second operand has 101 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 100 states have internal predecessors, (119), 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 15:17:43,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:17:43,196 INFO L93 Difference]: Finished difference Result 264 states and 329 transitions. [2022-11-23 15:17:43,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-23 15:17:43,196 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 100 states have internal predecessors, (119), 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 130 [2022-11-23 15:17:43,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:17:43,198 INFO L225 Difference]: With dead ends: 264 [2022-11-23 15:17:43,198 INFO L226 Difference]: Without dead ends: 182 [2022-11-23 15:17:43,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 323 SyntacticMatches, 11 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-23 15:17:43,203 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:17:43,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:17:43,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-23 15:17:43,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-11-23 15:17:43,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.0497237569060773) internal successors, (190), 181 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 15:17:43,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 190 transitions. [2022-11-23 15:17:43,217 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 190 transitions. Word has length 130 [2022-11-23 15:17:43,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:17:43,217 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 190 transitions. [2022-11-23 15:17:43,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 100 states have internal predecessors, (119), 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 15:17:43,218 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 190 transitions. [2022-11-23 15:17:43,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-23 15:17:43,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:43,221 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:17:43,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:17:43,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:17:43,437 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:17:43,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:43,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1322246750, now seen corresponding path program 8 times [2022-11-23 15:17:43,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:43,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370791455] [2022-11-23 15:17:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:43,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5236 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-11-23 15:17:51,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:17:51,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370791455] [2022-11-23 15:17:51,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370791455] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:17:51,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098280542] [2022-11-23 15:17:51,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:17:51,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:17:51,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:17:51,428 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:17:51,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:18:00,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 15:18:00,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:18:00,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 15:18:00,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:18:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5236 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5181 trivial. 0 not checked. [2022-11-23 15:18:01,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:18:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5236 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5181 trivial. 0 not checked. [2022-11-23 15:18:01,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098280542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:18:01,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [851746143] [2022-11-23 15:18:01,634 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 15:18:01,634 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:18:01,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:18:01,635 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:18:01,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:18:01,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:01,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:01,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:01,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:01,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:01,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:01,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:01,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:02,041 INFO L321 Elim1Store]: treesize reduction 703, result has 8.6 percent of original size [2022-11-23 15:18:02,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 17 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 82 [2022-11-23 15:18:02,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:02,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:02,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:02,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:02,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:02,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:02,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:02,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:02,608 INFO L321 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-11-23 15:18:02,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-11-23 15:18:02,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:02,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 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 15:18:02,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:02,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:03,003 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:18:03,004 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 756 treesize of output 744 [2022-11-23 15:18:03,210 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 15:18:03,243 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:18:03,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:18:03,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:03,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:03,336 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:18:03,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2022-11-23 15:18:03,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:03,405 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:18:03,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:18:03,433 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:18:03,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:18:03,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:03,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:03,531 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:18:03,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-23 15:18:03,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:03,602 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:18:03,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:18:03,628 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:18:03,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:18:03,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:03,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:03,717 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:18:03,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-23 15:18:03,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:03,811 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:18:03,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:18:03,839 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:18:03,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:18:03,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:03,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:03,936 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:18:03,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-23 15:18:04,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:04,022 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:18:04,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:18:04,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:04,050 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:18:04,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:18:04,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:04,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:04,093 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:18:04,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:18:04,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:04,145 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:18:04,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:18:04,174 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:18:04,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:18:04,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:04,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:04,285 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:18:04,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-23 15:18:04,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:04,389 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:18:04,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:18:04,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:04,416 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:18:04,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:18:04,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:04,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:04,469 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:18:04,469 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 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:18:04,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:04,518 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:18:04,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:18:04,534 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:18:05,379 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7237#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem18#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem19#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:18:05,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:18:05,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:18:05,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-11-23 15:18:05,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982644484] [2022-11-23 15:18:05,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:18:05,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-23 15:18:05,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:18:05,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-23 15:18:05,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-23 15:18:05,386 INFO L87 Difference]: Start difference. First operand 182 states and 190 transitions. Second operand has 123 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 123 states have internal predecessors, (143), 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 15:18:06,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:18:06,084 INFO L93 Difference]: Finished difference Result 349 states and 449 transitions. [2022-11-23 15:18:06,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-23 15:18:06,085 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 123 states have internal predecessors, (143), 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 180 [2022-11-23 15:18:06,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:18:06,086 INFO L225 Difference]: With dead ends: 349 [2022-11-23 15:18:06,086 INFO L226 Difference]: Without dead ends: 267 [2022-11-23 15:18:06,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-23 15:18:06,091 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:18:06,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:18:06,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-23 15:18:06,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2022-11-23 15:18:06,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.0338345864661653) internal successors, (275), 266 states have internal predecessors, (275), 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 15:18:06,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 275 transitions. [2022-11-23 15:18:06,121 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 275 transitions. Word has length 180 [2022-11-23 15:18:06,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:18:06,122 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 275 transitions. [2022-11-23 15:18:06,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 123 states have internal predecessors, (143), 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 15:18:06,122 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 275 transitions. [2022-11-23 15:18:06,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-11-23 15:18:06,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:18:06,136 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:18:06,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:18:06,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 15:18:06,345 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:18:06,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:18:06,346 INFO L85 PathProgramCache]: Analyzing trace with hash -65948331, now seen corresponding path program 9 times [2022-11-23 15:18:06,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:18:06,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559321591] [2022-11-23 15:18:06,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:18:06,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:18:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:18:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6721 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2022-11-23 15:18:14,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:18:14,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559321591] [2022-11-23 15:18:14,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559321591] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:18:14,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568718579] [2022-11-23 15:18:14,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:18:14,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:18:14,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:18:14,986 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:18:15,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 15:18:15,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:18:15,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:18:15,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 2166 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-23 15:18:15,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:18:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6721 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2022-11-23 15:18:15,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:18:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6721 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2022-11-23 15:18:28,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568718579] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:18:28,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [431843164] [2022-11-23 15:18:28,005 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 15:18:28,005 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:18:28,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:18:28,006 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:18:28,006 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:18:28,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:28,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:28,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:28,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:28,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:28,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:28,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:28,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:28,391 INFO L321 Elim1Store]: treesize reduction 703, result has 8.6 percent of original size [2022-11-23 15:18:28,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 17 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 82 [2022-11-23 15:18:28,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:28,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:28,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:28,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:28,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:28,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:28,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:28,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:28,954 INFO L321 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-11-23 15:18:28,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-11-23 15:18:29,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:29,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 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 15:18:29,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:29,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:29,314 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:18:29,315 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 756 treesize of output 744 [2022-11-23 15:18:29,547 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 15:18:29,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:29,576 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:18:29,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:18:29,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:29,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:29,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:29,626 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:18:29,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:18:29,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:29,671 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:18:29,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:18:29,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:29,702 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:18:29,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:18:29,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:29,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:29,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:29,756 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:18:29,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:18:29,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:29,805 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:18:29,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:18:29,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:29,835 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:18:29,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:18:29,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:29,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:29,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:29,909 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:18:29,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:18:29,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:29,956 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:18:29,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:18:29,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:29,984 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:18:29,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:18:30,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:30,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:30,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:30,030 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:18:30,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:18:30,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:30,086 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:18:30,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:18:30,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:30,139 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:18:30,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:18:30,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:30,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:30,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:30,189 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:18:30,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:18:30,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:30,240 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:18:30,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:18:30,268 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:18:30,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:18:30,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:30,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:30,348 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:18:30,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-23 15:18:30,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:30,417 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:18:30,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:18:30,444 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:18:30,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:18:30,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:30,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:30,533 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:18:30,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2022-11-23 15:18:30,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:18:30,604 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:18:30,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:18:30,622 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:18:34,832 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10247#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem18#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem19#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:18:34,833 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:18:34,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:18:34,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-23 15:18:34,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676030504] [2022-11-23 15:18:34,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:18:34,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-23 15:18:34,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:18:34,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-23 15:18:34,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-23 15:18:34,844 INFO L87 Difference]: Start difference. First operand 267 states and 275 transitions. Second operand has 203 states, 203 states have (on average 1.0886699507389161) internal successors, (221), 202 states have internal predecessors, (221), 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 15:18:35,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:18:35,504 INFO L93 Difference]: Finished difference Result 534 states and 650 transitions. [2022-11-23 15:18:35,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-23 15:18:35,505 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0886699507389161) internal successors, (221), 202 states have internal predecessors, (221), 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 265 [2022-11-23 15:18:35,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:18:35,510 INFO L225 Difference]: With dead ends: 534 [2022-11-23 15:18:35,510 INFO L226 Difference]: Without dead ends: 368 [2022-11-23 15:18:35,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 665 SyntacticMatches, 23 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8796 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-23 15:18:35,515 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:18:35,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:18:35,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-11-23 15:18:35,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2022-11-23 15:18:35,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.0245231607629428) internal successors, (376), 367 states have internal predecessors, (376), 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 15:18:35,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 376 transitions. [2022-11-23 15:18:35,533 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 376 transitions. Word has length 265 [2022-11-23 15:18:35,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:18:35,534 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 376 transitions. [2022-11-23 15:18:35,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0886699507389161) internal successors, (221), 202 states have internal predecessors, (221), 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 15:18:35,535 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 376 transitions. [2022-11-23 15:18:35,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-11-23 15:18:35,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:18:35,541 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:18:35,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:18:35,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 15:18:35,751 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:18:35,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:18:35,751 INFO L85 PathProgramCache]: Analyzing trace with hash 396878270, now seen corresponding path program 10 times [2022-11-23 15:18:35,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:18:35,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887187165] [2022-11-23 15:18:35,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:18:35,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:18:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 21871 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2022-11-23 15:19:04,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:04,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887187165] [2022-11-23 15:19:04,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887187165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:04,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620310846] [2022-11-23 15:19:04,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:19:04,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:04,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:04,132 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:04,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 15:19:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:05,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 3075 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-23 15:19:05,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 21871 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2022-11-23 15:19:05,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:19:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 21871 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2022-11-23 15:19:53,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620310846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:19:53,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [102640774] [2022-11-23 15:19:53,728 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 15:19:53,728 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:19:53,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:19:53,729 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:19:53,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:19:53,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:53,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:53,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:53,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:53,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:53,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:53,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:53,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:54,135 INFO L321 Elim1Store]: treesize reduction 703, result has 8.6 percent of original size [2022-11-23 15:19:54,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 17 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 82 [2022-11-23 15:19:54,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:54,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:54,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:54,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:54,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:54,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:54,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:54,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:54,689 INFO L321 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-11-23 15:19:54,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-11-23 15:19:54,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:54,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 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 15:19:55,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:55,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:55,054 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 15:19:55,054 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 746 treesize of output 745 [2022-11-23 15:19:55,535 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 15:19:55,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:55,565 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:19:55,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:19:55,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:55,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:55,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:55,622 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:19:55,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:19:55,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:55,680 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:19:55,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:19:55,712 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:19:55,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:19:55,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:55,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:55,816 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:19:55,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2022-11-23 15:19:55,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:55,894 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:19:55,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:19:55,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:55,926 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:19:55,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:19:55,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:55,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:55,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:55,979 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:19:55,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:19:56,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:56,031 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:19:56,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:19:56,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:56,059 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:19:56,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:19:56,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:56,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:56,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:56,114 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:19:56,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:19:56,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:56,182 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:19:56,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:19:56,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:56,241 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:19:56,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:19:56,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:56,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:56,293 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:19:56,293 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 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:19:56,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:56,351 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:19:56,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:19:56,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:56,382 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:19:56,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:19:56,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:19:56,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:56,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:56,441 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:19:56,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2022-11-23 15:19:56,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:56,497 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:19:56,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:19:56,528 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:19:56,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:19:56,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:56,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:56,620 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:19:56,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 135 [2022-11-23 15:19:56,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:19:56,729 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:19:56,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:19:56,748 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:20:04,584 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14637#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem18#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem19#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:20:04,584 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:20:04,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:20:04,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-23 15:20:04,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839490433] [2022-11-23 15:20:04,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:20:04,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-23 15:20:04,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:20:04,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-23 15:20:04,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-23 15:20:04,607 INFO L87 Difference]: Start difference. First operand 368 states and 376 transitions. Second operand has 405 states, 405 states have (on average 1.0444444444444445) internal successors, (423), 404 states have internal predecessors, (423), 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 15:20:07,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:20:07,522 INFO L93 Difference]: Finished difference Result 736 states and 953 transitions. [2022-11-23 15:20:07,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-23 15:20:07,523 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0444444444444445) internal successors, (423), 404 states have internal predecessors, (423), 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 366 [2022-11-23 15:20:07,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:20:07,526 INFO L225 Difference]: With dead ends: 736 [2022-11-23 15:20:07,526 INFO L226 Difference]: Without dead ends: 570 [2022-11-23 15:20:07,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1298 GetRequests, 867 SyntacticMatches, 23 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17684 ImplicationChecksByTransitivity, 71.3s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-23 15:20:07,537 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:20:07,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:20:07,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-11-23 15:20:07,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2022-11-23 15:20:07,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 1.015817223198594) internal successors, (578), 569 states have internal predecessors, (578), 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 15:20:07,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 578 transitions. [2022-11-23 15:20:07,559 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 578 transitions. Word has length 366 [2022-11-23 15:20:07,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:20:07,559 INFO L495 AbstractCegarLoop]: Abstraction has 570 states and 578 transitions. [2022-11-23 15:20:07,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0444444444444445) internal successors, (423), 404 states have internal predecessors, (423), 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 15:20:07,560 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 578 transitions. [2022-11-23 15:20:07,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2022-11-23 15:20:07,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:20:07,572 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:20:07,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-23 15:20:07,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 15:20:07,783 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:20:07,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:20:07,784 INFO L85 PathProgramCache]: Analyzing trace with hash -774021090, now seen corresponding path program 11 times [2022-11-23 15:20:07,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:20:07,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549654131] [2022-11-23 15:20:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:07,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:20:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:22:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 82774 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2022-11-23 15:22:04,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:22:04,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549654131] [2022-11-23 15:22:04,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549654131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:22:04,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147025185] [2022-11-23 15:22:04,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:22:04,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:22:04,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:22:04,193 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:22:04,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e94deb-a577-41e3-a035-15186a0b3f34/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process