./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy4_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/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_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy4_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/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_30cb76f1-e4c5-453b-956c-5af86c2033cd/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 46a2982bcd9fbf87ad95f35e8d160ffed7259af3c1cb1d5fe78d4df5a4783123 --- 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 14:52:33,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:52:33,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:52:34,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:52:34,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:52:34,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:52:34,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:52:34,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:52:34,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:52:34,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:52:34,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:52:34,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:52:34,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:52:34,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:52:34,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:52:34,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:52:34,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:52:34,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:52:34,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:52:34,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:52:34,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:52:34,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:52:34,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:52:34,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:52:34,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:52:34,096 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:52:34,096 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:52:34,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:52:34,099 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:52:34,100 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:52:34,100 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:52:34,101 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:52:34,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:52:34,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:52:34,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:52:34,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:52:34,108 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:52:34,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:52:34,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:52:34,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:52:34,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:52:34,111 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:52:34,151 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:52:34,151 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:52:34,152 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:52:34,152 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:52:34,154 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:52:34,154 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:52:34,154 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:52:34,155 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:52:34,155 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:52:34,155 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:52:34,156 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:52:34,157 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:52:34,157 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:52:34,157 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:52:34,158 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:52:34,158 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:52:34,158 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:52:34,159 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:52:34,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:52:34,160 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:52:34,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:52:34,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:52:34,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:52:34,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:52:34,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:52:34,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:52:34,162 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:52:34,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:52:34,163 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:52:34,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:52:34,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:52:34,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:52:34,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:52:34,165 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:52:34,165 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:52:34,165 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:52:34,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:52:34,166 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:52:34,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:52:34,166 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:52:34,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:52:34,167 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_30cb76f1-e4c5-453b-956c-5af86c2033cd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 46a2982bcd9fbf87ad95f35e8d160ffed7259af3c1cb1d5fe78d4df5a4783123 [2022-11-23 14:52:34,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:52:34,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:52:34,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:52:34,562 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:52:34,563 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:52:34,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-examples/standard_copy4_ground-1.i [2022-11-23 14:52:37,755 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:52:37,980 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:52:37,981 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/sv-benchmarks/c/array-examples/standard_copy4_ground-1.i [2022-11-23 14:52:37,988 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/data/9ea64ca5a/41397bc4b2554838a1dec43babae34c5/FLAG036b474ca [2022-11-23 14:52:38,003 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/data/9ea64ca5a/41397bc4b2554838a1dec43babae34c5 [2022-11-23 14:52:38,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:52:38,007 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:52:38,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:52:38,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:52:38,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:52:38,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:52:38" (1/1) ... [2022-11-23 14:52:38,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f4508a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:38, skipping insertion in model container [2022-11-23 14:52:38,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:52:38" (1/1) ... [2022-11-23 14:52:38,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:52:38,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:52:38,193 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_30cb76f1-e4c5-453b-956c-5af86c2033cd/sv-benchmarks/c/array-examples/standard_copy4_ground-1.i[816,829] [2022-11-23 14:52:38,210 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:52:38,217 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:52:38,230 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_30cb76f1-e4c5-453b-956c-5af86c2033cd/sv-benchmarks/c/array-examples/standard_copy4_ground-1.i[816,829] [2022-11-23 14:52:38,240 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:52:38,253 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:52:38,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:38 WrapperNode [2022-11-23 14:52:38,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:52:38,255 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:52:38,255 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:52:38,255 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:52:38,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:38" (1/1) ... [2022-11-23 14:52:38,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:38" (1/1) ... [2022-11-23 14:52:38,287 INFO L138 Inliner]: procedures = 16, calls = 33, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 112 [2022-11-23 14:52:38,288 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:52:38,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:52:38,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:52:38,289 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:52:38,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:38" (1/1) ... [2022-11-23 14:52:38,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:38" (1/1) ... [2022-11-23 14:52:38,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:38" (1/1) ... [2022-11-23 14:52:38,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:38" (1/1) ... [2022-11-23 14:52:38,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:38" (1/1) ... [2022-11-23 14:52:38,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:38" (1/1) ... [2022-11-23 14:52:38,324 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:38" (1/1) ... [2022-11-23 14:52:38,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:38" (1/1) ... [2022-11-23 14:52:38,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:52:38,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:52:38,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:52:38,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:52:38,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:38" (1/1) ... [2022-11-23 14:52:38,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:52:38,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:52:38,372 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:52:38,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:52:38,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:52:38,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:52:38,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:52:38,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:52:38,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:52:38,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:52:38,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:52:38,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:52:38,492 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:52:38,502 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:52:38,772 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:52:38,872 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:52:38,872 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-23 14:52:38,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:52:38 BoogieIcfgContainer [2022-11-23 14:52:38,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:52:38,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:52:38,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:52:38,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:52:38,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:52:38" (1/3) ... [2022-11-23 14:52:38,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e22c882 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:52:38, skipping insertion in model container [2022-11-23 14:52:38,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:38" (2/3) ... [2022-11-23 14:52:38,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e22c882 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:52:38, skipping insertion in model container [2022-11-23 14:52:38,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:52:38" (3/3) ... [2022-11-23 14:52:38,908 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-1.i [2022-11-23 14:52:38,931 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:52:38,932 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:52:39,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:52:39,009 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;@34d93278, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:52:39,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:52:39,013 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:52:39,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 14:52:39,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:52:39,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:52:39,024 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:52:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:52:39,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1775972037, now seen corresponding path program 1 times [2022-11-23 14:52:39,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:52:39,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946458823] [2022-11-23 14:52:39,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:52:39,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:52:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:52:39,292 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 14:52:39,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:52:39,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946458823] [2022-11-23 14:52:39,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946458823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:52:39,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:52:39,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:52:39,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552926970] [2022-11-23 14:52:39,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:52:39,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:52:39,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:52:39,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:52:39,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:52:39,331 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 14:52:39,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:52:39,394 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2022-11-23 14:52:39,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:52:39,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2022-11-23 14:52:39,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:52:39,404 INFO L225 Difference]: With dead ends: 23 [2022-11-23 14:52:39,404 INFO L226 Difference]: Without dead ends: 12 [2022-11-23 14:52:39,407 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 14:52:39,413 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:52:39,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:52:39,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-23 14:52:39,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-23 14:52:39,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 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 14:52:39,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2022-11-23 14:52:39,447 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 9 [2022-11-23 14:52:39,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:52:39,448 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2022-11-23 14:52:39,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 14:52:39,449 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2022-11-23 14:52:39,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 14:52:39,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:52:39,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:52:39,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:52:39,452 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:52:39,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:52:39,453 INFO L85 PathProgramCache]: Analyzing trace with hash -594488320, now seen corresponding path program 1 times [2022-11-23 14:52:39,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:52:39,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792017169] [2022-11-23 14:52:39,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:52:39,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:52:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:52:39,643 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 14:52:39,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:52:39,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792017169] [2022-11-23 14:52:39,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792017169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:52:39,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322322336] [2022-11-23 14:52:39,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:52:39,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:52:39,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:52:39,648 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:52:39,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:52:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:52:39,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:52:39,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:52:39,769 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 14:52:39,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:52:39,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322322336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:52:39,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:52:39,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-23 14:52:39,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681442899] [2022-11-23 14:52:39,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:52:39,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:52:39,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:52:39,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:52:39,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:52:39,773 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 14:52:39,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:52:39,809 INFO L93 Difference]: Finished difference Result 24 states and 36 transitions. [2022-11-23 14:52:39,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:52:39,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2022-11-23 14:52:39,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:52:39,810 INFO L225 Difference]: With dead ends: 24 [2022-11-23 14:52:39,810 INFO L226 Difference]: Without dead ends: 16 [2022-11-23 14:52:39,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 14:52:39,812 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:52:39,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:52:39,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-23 14:52:39,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-23 14:52:39,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:52:39,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2022-11-23 14:52:39,822 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 10 [2022-11-23 14:52:39,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:52:39,823 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2022-11-23 14:52:39,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 14:52:39,823 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2022-11-23 14:52:39,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 14:52:39,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:52:39,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:52:39,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:52:40,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-23 14:52:40,035 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:52:40,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:52:40,036 INFO L85 PathProgramCache]: Analyzing trace with hash -890727347, now seen corresponding path program 1 times [2022-11-23 14:52:40,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:52:40,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28349459] [2022-11-23 14:52:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:52:40,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:52:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:52:40,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:52:40,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:52:40,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28349459] [2022-11-23 14:52:40,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28349459] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:52:40,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912461283] [2022-11-23 14:52:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:52:40,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:52:40,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:52:40,210 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:52:40,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:52:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:52:40,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:52:40,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:52:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:52:40,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:52:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:52:40,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912461283] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:52:40,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1292900836] [2022-11-23 14:52:40,439 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 14:52:40,439 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:52:40,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:52:40,450 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:52:40,450 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:52:40,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:40,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:40,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:40,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:40,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:40,817 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 14:52:40,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 14:52:40,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:40,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:40,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:40,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:40,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:40,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-11-23 14:52:41,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:41,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:52:41,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:41,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:41,465 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:52:41,465 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 458 treesize of output 457 [2022-11-23 14:52:41,982 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 14:52:42,020 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:52:42,020 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 14:52:42,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:42,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:42,153 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:52:42,154 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 88 treesize of output 117 [2022-11-23 14:52:42,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:42,340 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:42,341 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 14:52:42,382 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:52:42,383 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 14:52:42,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:42,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:42,496 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:52:42,497 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 88 treesize of output 117 [2022-11-23 14:52:42,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:42,659 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:42,660 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 14:52:42,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:42,706 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:42,706 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 14:52:42,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:42,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:42,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:42,774 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:52:42,775 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 98 treesize of output 103 [2022-11-23 14:52:42,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:42,849 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:42,850 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 14:52:42,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:42,911 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:42,912 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 14:52:42,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:42,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:42,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:42,974 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:52:42,974 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 98 treesize of output 103 [2022-11-23 14:52:43,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:43,072 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:43,072 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 14:52:43,098 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:52:43,438 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '255#(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|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#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)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:52:43,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:52:43,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:52:43,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 14:52:43,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337572715] [2022-11-23 14:52:43,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:52:43,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:52:43,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:52:43,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:52:43,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:52:43,442 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:52:43,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:52:43,495 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2022-11-23 14:52:43,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:52:43,496 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 14:52:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:52:43,496 INFO L225 Difference]: With dead ends: 32 [2022-11-23 14:52:43,497 INFO L226 Difference]: Without dead ends: 19 [2022-11-23 14:52:43,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:52:43,498 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:52:43,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:52:43,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-23 14:52:43,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-23 14:52:43,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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 14:52:43,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-11-23 14:52:43,503 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 14 [2022-11-23 14:52:43,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:52:43,504 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-11-23 14:52:43,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:52:43,504 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-11-23 14:52:43,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 14:52:43,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:52:43,505 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:52:43,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 14:52:43,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:52:43,712 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:52:43,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:52:43,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1011981138, now seen corresponding path program 2 times [2022-11-23 14:52:43,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:52:43,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667143302] [2022-11-23 14:52:43,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:52:43,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:52:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:52:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 14:52:43,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:52:43,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667143302] [2022-11-23 14:52:43,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667143302] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:52:43,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828909580] [2022-11-23 14:52:43,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:52:43,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:52:43,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:52:43,865 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:52:43,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:52:43,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 14:52:43,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:52:43,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:52:43,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:52:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 14:52:44,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:52:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 14:52:44,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828909580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:52:44,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1927852442] [2022-11-23 14:52:44,019 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 14:52:44,019 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:52:44,019 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:52:44,020 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:52:44,020 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:52:44,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:44,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:44,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:44,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:44,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:44,262 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-11-23 14:52:44,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 29 treesize of output 58 [2022-11-23 14:52:44,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:44,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:44,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:44,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:44,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:44,506 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 14:52:44,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 14:52:44,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:44,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:52:44,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:44,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:44,803 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 14:52:44,804 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 468 treesize of output 456 [2022-11-23 14:52:44,999 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 14:52:45,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:45,040 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:45,041 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 14:52:45,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:45,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:45,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:45,103 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:52:45,104 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 98 treesize of output 103 [2022-11-23 14:52:45,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:45,161 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:45,162 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 14:52:45,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:45,192 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:45,193 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 14:52:45,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:45,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:45,250 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:52:45,251 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 98 treesize of output 103 [2022-11-23 14:52:45,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:45,300 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:45,304 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 14:52:45,334 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:52:45,335 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 14:52:45,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:45,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:45,421 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:52:45,422 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 88 treesize of output 117 [2022-11-23 14:52:45,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:45,532 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:45,532 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 14:52:45,565 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:52:45,566 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 14:52:45,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:45,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:45,677 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:52:45,677 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 88 treesize of output 107 [2022-11-23 14:52:45,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:45,764 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:45,765 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 14:52:45,789 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:52:46,136 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '451#(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|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#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)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:52:46,136 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:52:46,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:52:46,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 14:52:46,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266779657] [2022-11-23 14:52:46,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:52:46,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:52:46,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:52:46,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:52:46,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:52:46,138 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:52:46,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:52:46,235 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2022-11-23 14:52:46,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:52:46,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-23 14:52:46,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:52:46,236 INFO L225 Difference]: With dead ends: 42 [2022-11-23 14:52:46,236 INFO L226 Difference]: Without dead ends: 31 [2022-11-23 14:52:46,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:52:46,238 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:52:46,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:52:46,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-23 14:52:46,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-23 14:52:46,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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 14:52:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-23 14:52:46,244 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 17 [2022-11-23 14:52:46,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:52:46,244 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-23 14:52:46,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:52:46,245 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-23 14:52:46,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 14:52:46,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:52:46,246 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:52:46,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:52:46,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:52:46,459 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:52:46,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:52:46,460 INFO L85 PathProgramCache]: Analyzing trace with hash -334360635, now seen corresponding path program 3 times [2022-11-23 14:52:46,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:52:46,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290088497] [2022-11-23 14:52:46,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:52:46,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:52:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:52:46,798 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 14:52:46,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:52:46,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290088497] [2022-11-23 14:52:46,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290088497] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:52:46,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819938306] [2022-11-23 14:52:46,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:52:46,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:52:46,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:52:46,803 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:52:46,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:52:46,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:52:46,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:52:46,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:52:46,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:52:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 14:52:46,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:52:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 14:52:47,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819938306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:52:47,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1039267445] [2022-11-23 14:52:47,031 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 14:52:47,032 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:52:47,032 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:52:47,033 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:52:47,033 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:52:47,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:47,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:47,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:47,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:47,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:47,276 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 14:52:47,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 14:52:47,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:47,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:47,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:47,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:47,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:47,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-11-23 14:52:47,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:47,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:52:47,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:47,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:47,626 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:52:47,627 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 458 treesize of output 457 [2022-11-23 14:52:47,924 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 14:52:47,950 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:52:47,951 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 15 treesize of output 15 [2022-11-23 14:52:47,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:47,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:48,050 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:52:48,051 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 88 treesize of output 107 [2022-11-23 14:52:48,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:48,112 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:48,113 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 14:52:48,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:48,155 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:48,155 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 14:52:48,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:48,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:48,200 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:52:48,200 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 98 treesize of output 103 [2022-11-23 14:52:48,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:48,247 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:48,248 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 14:52:48,275 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:52:48,275 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 14:52:48,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:48,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:48,354 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:52:48,355 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 88 treesize of output 107 [2022-11-23 14:52:48,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:48,421 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:48,421 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 14:52:48,449 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:52:48,449 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 14:52:48,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:48,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:48,570 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:52:48,570 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 88 treesize of output 107 [2022-11-23 14:52:48,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:48,658 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:48,659 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 14:52:48,686 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:52:49,066 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '769#(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|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#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)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:52:49,067 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:52:49,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:52:49,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 14:52:49,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471885941] [2022-11-23 14:52:49,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:52:49,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:52:49,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:52:49,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:52:49,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-23 14:52:49,068 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 14:52:49,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:52:49,139 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-11-23 14:52:49,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:52:49,139 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 29 [2022-11-23 14:52:49,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:52:49,140 INFO L225 Difference]: With dead ends: 62 [2022-11-23 14:52:49,140 INFO L226 Difference]: Without dead ends: 37 [2022-11-23 14:52:49,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-23 14:52:49,141 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:52:49,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:52:49,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-23 14:52:49,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-23 14:52:49,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 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 14:52:49,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-11-23 14:52:49,147 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 29 [2022-11-23 14:52:49,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:52:49,147 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-11-23 14:52:49,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 14:52:49,147 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-11-23 14:52:49,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 14:52:49,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:52:49,148 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:52:49,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:52:49,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:52:49,349 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:52:49,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:52:49,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1231245851, now seen corresponding path program 4 times [2022-11-23 14:52:49,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:52:49,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672150543] [2022-11-23 14:52:49,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:52:49,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:52:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:52:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 14:52:49,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:52:49,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672150543] [2022-11-23 14:52:49,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672150543] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:52:49,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975607304] [2022-11-23 14:52:49,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:52:49,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:52:49,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:52:49,701 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:52:49,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:52:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:52:49,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:52:49,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:52:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 14:52:49,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:52:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 14:52:50,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975607304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:52:50,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1381586383] [2022-11-23 14:52:50,108 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 14:52:50,108 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:52:50,108 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:52:50,108 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:52:50,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:52:50,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:50,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:50,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:50,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:50,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:50,352 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 14:52:50,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 14:52:50,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:50,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:50,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:50,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:50,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:50,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-11-23 14:52:50,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:50,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:52:50,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:50,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:50,626 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:52:50,627 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 458 treesize of output 457 [2022-11-23 14:52:50,899 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 14:52:50,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:50,925 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:50,925 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 14:52:50,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:50,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:50,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:50,981 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:52:50,981 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 98 treesize of output 103 [2022-11-23 14:52:51,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:51,026 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:51,027 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 14:52:51,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:51,051 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:51,051 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 14:52:51,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:51,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:51,097 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:52:51,098 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 98 treesize of output 103 [2022-11-23 14:52:51,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:51,142 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:51,142 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 14:52:51,167 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:52:51,168 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 14:52:51,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:51,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:51,264 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:52:51,264 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 88 treesize of output 117 [2022-11-23 14:52:51,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:51,359 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:51,359 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 14:52:51,389 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:52:51,389 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 14:52:51,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:51,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:51,465 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:52:51,466 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 88 treesize of output 117 [2022-11-23 14:52:51,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:51,581 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:51,582 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 14:52:51,624 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:52:51,880 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1187#(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|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#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)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:52:51,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:52:51,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:52:51,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-23 14:52:51,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36801929] [2022-11-23 14:52:51,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:52:51,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 14:52:51,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:52:51,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 14:52:51,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:52:51,883 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:52:51,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:52:51,955 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2022-11-23 14:52:51,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 14:52:51,955 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-23 14:52:51,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:52:51,956 INFO L225 Difference]: With dead ends: 74 [2022-11-23 14:52:51,956 INFO L226 Difference]: Without dead ends: 49 [2022-11-23 14:52:51,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:52:51,958 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:52:51,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:52:51,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-23 14:52:51,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-23 14:52:51,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.125) internal successors, (54), 48 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 14:52:51,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-11-23 14:52:51,965 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 35 [2022-11-23 14:52:51,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:52:51,965 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-11-23 14:52:51,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:52:51,966 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-11-23 14:52:51,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 14:52:51,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:52:51,967 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:52:51,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-23 14:52:52,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 14:52:52,172 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:52:52,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:52:52,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1594973659, now seen corresponding path program 5 times [2022-11-23 14:52:52,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:52:52,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577148075] [2022-11-23 14:52:52,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:52:52,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:52:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:52:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 14:52:52,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:52:52,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577148075] [2022-11-23 14:52:52,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577148075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:52:52,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781111679] [2022-11-23 14:52:52,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:52:52,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:52:52,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:52:52,922 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:52:52,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:52:53,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:52:53,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:52:53,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:52:53,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:52:53,234 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-11-23 14:52:53,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:52:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-11-23 14:52:53,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781111679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:52:53,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1125925338] [2022-11-23 14:52:53,367 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 14:52:53,367 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:52:53,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:52:53,368 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:52:53,368 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:52:53,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:53,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:53,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:53,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:53,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:53,533 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-11-23 14:52:53,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 29 treesize of output 58 [2022-11-23 14:52:53,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:53,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:53,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:53,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:53,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:53,760 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 14:52:53,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 14:52:53,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:53,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:52:53,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:53,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:54,025 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:52:54,025 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 458 treesize of output 457 [2022-11-23 14:52:54,289 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 14:52:54,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:54,318 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:54,318 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 14:52:54,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:54,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:54,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:54,362 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:52:54,362 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 98 treesize of output 103 [2022-11-23 14:52:54,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:54,409 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:54,409 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 14:52:54,436 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:52:54,436 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 14:52:54,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:54,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:54,524 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:52:54,524 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 88 treesize of output 117 [2022-11-23 14:52:54,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:54,597 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:54,597 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 14:52:54,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:54,624 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:54,625 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 14:52:54,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:54,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:54,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:54,670 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:52:54,671 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 98 treesize of output 103 [2022-11-23 14:52:54,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:54,724 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:54,724 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 14:52:54,765 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:52:54,765 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 15 treesize of output 15 [2022-11-23 14:52:54,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:54,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:54,839 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:52:54,839 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 88 treesize of output 107 [2022-11-23 14:52:54,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:54,903 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:54,903 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 14:52:54,919 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:52:55,516 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1735#(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|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#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)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:52:55,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:52:55,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:52:55,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-23 14:52:55,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510658329] [2022-11-23 14:52:55,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:52:55,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 14:52:55,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:52:55,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 14:52:55,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 14:52:55,519 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 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 14:52:55,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:52:55,745 INFO L93 Difference]: Finished difference Result 99 states and 133 transitions. [2022-11-23 14:52:55,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-23 14:52:55,746 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 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 47 [2022-11-23 14:52:55,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:52:55,752 INFO L225 Difference]: With dead ends: 99 [2022-11-23 14:52:55,752 INFO L226 Difference]: Without dead ends: 74 [2022-11-23 14:52:55,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 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 14:52:55,755 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:52:55,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:52:55,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-23 14:52:55,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-23 14:52:55,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.082191780821918) internal successors, (79), 73 states have internal predecessors, (79), 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 14:52:55,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2022-11-23 14:52:55,781 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 47 [2022-11-23 14:52:55,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:52:55,781 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2022-11-23 14:52:55,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 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 14:52:55,782 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2022-11-23 14:52:55,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-23 14:52:55,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:52:55,787 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:52:55,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:52:55,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 14:52:55,994 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:52:55,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:52:55,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1448686976, now seen corresponding path program 6 times [2022-11-23 14:52:55,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:52:55,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806559889] [2022-11-23 14:52:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:52:55,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:52:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:52:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-23 14:52:56,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:52:56,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806559889] [2022-11-23 14:52:56,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806559889] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:52:56,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384478832] [2022-11-23 14:52:56,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:52:56,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:52:56,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:52:56,959 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:52:56,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:52:57,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:52:57,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:52:57,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:52:57,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:52:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-23 14:52:57,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:52:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-23 14:52:58,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384478832] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:52:58,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1946222538] [2022-11-23 14:52:58,058 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 14:52:58,058 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:52:58,059 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:52:58,059 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:52:58,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:52:58,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:58,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:58,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:58,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:58,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:58,217 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-11-23 14:52:58,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 29 treesize of output 58 [2022-11-23 14:52:58,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:58,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:58,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:58,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:58,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:58,441 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 14:52:58,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 14:52:58,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:58,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:52:58,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:58,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:58,675 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 14:52:58,675 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 468 treesize of output 456 [2022-11-23 14:52:58,818 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 14:52:58,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:58,849 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:58,849 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 14:52:58,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:58,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:58,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:58,894 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:52:58,895 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 98 treesize of output 103 [2022-11-23 14:52:58,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:58,956 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:58,956 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 14:52:58,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:58,982 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:58,982 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 14:52:59,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:59,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:59,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:59,033 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:52:59,033 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 98 treesize of output 103 [2022-11-23 14:52:59,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:59,071 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:59,072 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 14:52:59,102 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:52:59,102 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 14:52:59,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:59,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:59,183 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:52:59,183 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 88 treesize of output 117 [2022-11-23 14:52:59,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:59,293 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:59,294 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 14:52:59,318 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:52:59,318 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 14:52:59,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:59,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:59,409 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:52:59,409 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 88 treesize of output 117 [2022-11-23 14:52:59,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:59,508 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:52:59,509 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 14:52:59,533 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:52:59,953 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2549#(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|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#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)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:52:59,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:52:59,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:52:59,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-23 14:52:59,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728932011] [2022-11-23 14:52:59,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:52:59,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-23 14:52:59,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:52:59,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-23 14:52:59,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-23 14:52:59,958 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 50 states have internal predecessors, (63), 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 14:53:00,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:53:00,116 INFO L93 Difference]: Finished difference Result 148 states and 182 transitions. [2022-11-23 14:53:00,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-23 14:53:00,116 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 50 states have internal predecessors, (63), 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 72 [2022-11-23 14:53:00,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:53:00,117 INFO L225 Difference]: With dead ends: 148 [2022-11-23 14:53:00,118 INFO L226 Difference]: Without dead ends: 99 [2022-11-23 14:53:00,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-23 14:53:00,120 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:53:00,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:53:00,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-23 14:53:00,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-23 14:53:00,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0612244897959184) internal successors, (104), 98 states have internal predecessors, (104), 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 14:53:00,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2022-11-23 14:53:00,144 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 72 [2022-11-23 14:53:00,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:53:00,145 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2022-11-23 14:53:00,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 50 states have internal predecessors, (63), 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 14:53:00,150 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2022-11-23 14:53:00,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-23 14:53:00,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:53:00,152 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:53:00,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:53:00,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:53:00,359 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:53:00,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:53:00,359 INFO L85 PathProgramCache]: Analyzing trace with hash 697040229, now seen corresponding path program 7 times [2022-11-23 14:53:00,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:53:00,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937845332] [2022-11-23 14:53:00,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:53:00,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:53:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:53:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-23 14:53:03,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:53:03,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937845332] [2022-11-23 14:53:03,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937845332] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:53:03,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678025890] [2022-11-23 14:53:03,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:53:03,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:53:03,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:53:03,120 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:53:03,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:53:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:53:03,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-23 14:53:03,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:53:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-23 14:53:03,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:53:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-23 14:53:06,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678025890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:53:06,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2038943836] [2022-11-23 14:53:06,781 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 14:53:06,781 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:53:06,782 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:53:06,782 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:53:06,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:53:06,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:06,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:06,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:06,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:06,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:07,001 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 14:53:07,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 14:53:07,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:07,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:07,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:07,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:07,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:07,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-11-23 14:53:07,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:07,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:53:07,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:07,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:07,303 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:53:07,303 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 458 treesize of output 457 [2022-11-23 14:53:07,524 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 14:53:07,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:07,550 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:53:07,551 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 14:53:07,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:07,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:07,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:07,594 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:53:07,595 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 98 treesize of output 103 [2022-11-23 14:53:07,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:07,636 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:53:07,638 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 14:53:07,665 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:53:07,666 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 14:53:07,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:07,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:07,755 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:53:07,756 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 88 treesize of output 117 [2022-11-23 14:53:07,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:07,827 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:53:07,827 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 14:53:07,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:07,851 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:53:07,852 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 14:53:07,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:07,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:07,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:07,898 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:53:07,898 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 98 treesize of output 103 [2022-11-23 14:53:07,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:07,951 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:53:07,952 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 14:53:07,991 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:53:07,992 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 14:53:08,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:08,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:08,105 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:53:08,105 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 88 treesize of output 117 [2022-11-23 14:53:08,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:08,161 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:53:08,162 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 14:53:08,177 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:53:09,346 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3711#(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|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#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)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:53:09,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:53:09,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:53:09,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-23 14:53:09,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311841349] [2022-11-23 14:53:09,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:53:09,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-23 14:53:09,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:53:09,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-23 14:53:09,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-23 14:53:09,352 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 101 states, 101 states have (on average 1.118811881188119) internal successors, (113), 100 states have internal predecessors, (113), 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 14:53:09,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:53:09,575 INFO L93 Difference]: Finished difference Result 198 states and 257 transitions. [2022-11-23 14:53:09,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-23 14:53:09,576 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.118811881188119) internal successors, (113), 100 states have internal predecessors, (113), 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 97 [2022-11-23 14:53:09,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:53:09,577 INFO L225 Difference]: With dead ends: 198 [2022-11-23 14:53:09,577 INFO L226 Difference]: Without dead ends: 149 [2022-11-23 14:53:09,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 224 SyntacticMatches, 11 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-23 14:53:09,581 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:53:09,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:53:09,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-23 14:53:09,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-11-23 14:53:09,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0405405405405406) internal successors, (154), 148 states have internal predecessors, (154), 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 14:53:09,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 154 transitions. [2022-11-23 14:53:09,591 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 154 transitions. Word has length 97 [2022-11-23 14:53:09,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:53:09,592 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 154 transitions. [2022-11-23 14:53:09,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.118811881188119) internal successors, (113), 100 states have internal predecessors, (113), 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 14:53:09,592 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 154 transitions. [2022-11-23 14:53:09,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-23 14:53:09,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:53:09,595 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:53:09,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:53:09,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:53:09,802 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:53:09,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:53:09,802 INFO L85 PathProgramCache]: Analyzing trace with hash -69003835, now seen corresponding path program 8 times [2022-11-23 14:53:09,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:53:09,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926122460] [2022-11-23 14:53:09,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:53:09,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:53:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:53:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-23 14:53:17,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:53:17,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926122460] [2022-11-23 14:53:17,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926122460] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:53:17,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920793074] [2022-11-23 14:53:17,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:53:17,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:53:17,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:53:17,323 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:53:17,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:53:20,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 14:53:20,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:53:20,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:53:20,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:53:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5016 trivial. 0 not checked. [2022-11-23 14:53:21,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:53:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5016 trivial. 0 not checked. [2022-11-23 14:53:22,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920793074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:53:22,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2125105813] [2022-11-23 14:53:22,139 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 14:53:22,139 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:53:22,140 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:53:22,140 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:53:22,140 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:53:22,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:22,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:22,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:22,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:22,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:22,295 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-11-23 14:53:22,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 29 treesize of output 58 [2022-11-23 14:53:22,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:22,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:22,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:22,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:22,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:22,496 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 14:53:22,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 14:53:22,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:22,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:53:22,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:22,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:22,693 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 14:53:22,694 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 468 treesize of output 456 [2022-11-23 14:53:22,823 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 14:53:22,867 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:53:22,868 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 14:53:22,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:22,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:22,951 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:53:22,951 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 88 treesize of output 107 [2022-11-23 14:53:23,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:23,019 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:53:23,019 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 14:53:23,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:23,051 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:53:23,051 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 14:53:23,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:23,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:23,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:23,100 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:53:23,100 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 98 treesize of output 103 [2022-11-23 14:53:23,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:23,140 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:53:23,140 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 14:53:23,163 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:53:23,164 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 14:53:23,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:23,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:23,231 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:53:23,231 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 88 treesize of output 107 [2022-11-23 14:53:23,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:23,337 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:53:23,337 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 14:53:23,359 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:53:23,360 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 14:53:23,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:23,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:23,433 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:53:23,433 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 88 treesize of output 117 [2022-11-23 14:53:23,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:23,514 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:53:23,514 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 14:53:23,530 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:53:24,331 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5395#(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|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#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)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:53:24,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:53:24,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:53:24,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-11-23 14:53:24,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222070836] [2022-11-23 14:53:24,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:53:24,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-23 14:53:24,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:53:24,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-23 14:53:24,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-23 14:53:24,340 INFO L87 Difference]: Start difference. First operand 149 states and 154 transitions. Second operand has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 123 states have internal predecessors, (139), 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 14:53:24,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:53:24,808 INFO L93 Difference]: Finished difference Result 247 states and 305 transitions. [2022-11-23 14:53:24,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-23 14:53:24,809 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 123 states have internal predecessors, (139), 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 147 [2022-11-23 14:53:24,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:53:24,810 INFO L225 Difference]: With dead ends: 247 [2022-11-23 14:53:24,810 INFO L226 Difference]: Without dead ends: 198 [2022-11-23 14:53:24,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-23 14:53:24,815 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:53:24,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:53:24,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-23 14:53:24,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-11-23 14:53:24,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0304568527918783) internal successors, (203), 197 states have internal predecessors, (203), 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 14:53:24,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2022-11-23 14:53:24,828 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 147 [2022-11-23 14:53:24,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:53:24,829 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2022-11-23 14:53:24,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 123 states have internal predecessors, (139), 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 14:53:24,829 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2022-11-23 14:53:24,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-11-23 14:53:24,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:53:24,832 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:53:24,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:53:25,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 14:53:25,048 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:53:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:53:25,048 INFO L85 PathProgramCache]: Analyzing trace with hash 493677056, now seen corresponding path program 9 times [2022-11-23 14:53:25,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:53:25,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157763639] [2022-11-23 14:53:25,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:53:25,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:53:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:53:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5962 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-23 14:53:32,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:53:32,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157763639] [2022-11-23 14:53:32,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157763639] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:53:32,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402723563] [2022-11-23 14:53:32,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:53:32,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:53:32,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:53:32,628 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:53:32,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:53:33,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:53:33,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:53:33,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-23 14:53:33,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:53:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5962 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-23 14:53:33,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:53:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5962 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-23 14:53:45,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402723563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:53:45,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1729421221] [2022-11-23 14:53:45,312 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 14:53:45,312 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:53:45,312 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:53:45,313 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:53:45,313 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:53:45,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:45,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:45,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:45,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:45,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:45,524 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 14:53:45,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 14:53:45,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:45,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:45,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:45,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:45,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:45,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-11-23 14:53:45,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:45,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:53:45,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:45,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:45,767 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 14:53:45,767 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 468 treesize of output 456 [2022-11-23 14:53:45,896 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 14:53:45,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:45,929 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:53:45,929 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 14:53:45,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:45,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:45,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:45,970 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:53:45,970 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 98 treesize of output 103 [2022-11-23 14:53:45,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:46,007 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:53:46,007 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 14:53:46,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:46,031 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:53:46,031 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 14:53:46,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:46,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:46,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:46,072 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:53:46,073 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 98 treesize of output 103 [2022-11-23 14:53:46,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:46,121 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:53:46,121 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 14:53:46,147 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:53:46,147 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 14:53:46,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:46,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:46,217 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:53:46,217 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 88 treesize of output 107 [2022-11-23 14:53:46,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:46,273 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:53:46,273 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 14:53:46,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:46,299 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:53:46,299 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 14:53:46,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:46,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:46,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:46,338 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:53:46,338 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 98 treesize of output 103 [2022-11-23 14:53:46,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:46,394 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:53:46,395 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 14:53:46,414 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:53:49,908 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7649#(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|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#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)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:53:49,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:53:49,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:53:49,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-23 14:53:49,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341485765] [2022-11-23 14:53:49,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:53:49,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-23 14:53:49,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:53:49,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-23 14:53:49,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-23 14:53:49,919 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand has 203 states, 203 states have (on average 1.0591133004926108) internal successors, (215), 202 states have internal predecessors, (215), 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 14:53:50,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:53:50,517 INFO L93 Difference]: Finished difference Result 396 states and 506 transitions. [2022-11-23 14:53:50,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-23 14:53:50,518 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0591133004926108) internal successors, (215), 202 states have internal predecessors, (215), 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 196 [2022-11-23 14:53:50,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:53:50,520 INFO L225 Difference]: With dead ends: 396 [2022-11-23 14:53:50,521 INFO L226 Difference]: Without dead ends: 299 [2022-11-23 14:53:50,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 458 SyntacticMatches, 23 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8796 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-23 14:53:50,525 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:53:50,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:53:50,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-23 14:53:50,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-11-23 14:53:50,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.0201342281879195) internal successors, (304), 298 states have internal predecessors, (304), 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 14:53:50,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 304 transitions. [2022-11-23 14:53:50,547 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 304 transitions. Word has length 196 [2022-11-23 14:53:50,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:53:50,549 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 304 transitions. [2022-11-23 14:53:50,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0591133004926108) internal successors, (215), 202 states have internal predecessors, (215), 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 14:53:50,549 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 304 transitions. [2022-11-23 14:53:50,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-11-23 14:53:50,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:53:50,554 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:53:50,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:53:50,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 14:53:50,762 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:53:50,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:53:50,762 INFO L85 PathProgramCache]: Analyzing trace with hash 915975333, now seen corresponding path program 10 times [2022-11-23 14:53:50,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:53:50,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81663004] [2022-11-23 14:53:50,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:53:50,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:53:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 21112 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-23 14:54:16,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:54:16,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81663004] [2022-11-23 14:54:16,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81663004] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:54:16,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050180897] [2022-11-23 14:54:16,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:54:16,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:54:16,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:54:16,979 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:54:16,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:54:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:17,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 2538 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-23 14:54:17,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:54:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 21112 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-23 14:54:18,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:55:05,611 INFO L134 CoverageAnalysis]: Checked inductivity of 21112 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-23 14:55:05,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050180897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:55:05,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1621063943] [2022-11-23 14:55:05,613 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 14:55:05,614 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:55:05,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:55:05,614 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:55:05,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:55:05,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:55:05,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:55:05,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:55:05,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:55:05,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:55:05,771 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-11-23 14:55:05,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 29 treesize of output 58 [2022-11-23 14:55:05,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:55:05,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:55:05,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:55:05,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:55:05,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:55:06,009 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 14:55:06,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 14:55:06,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:55:06,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:55:06,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:55:06,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:55:06,201 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:55:06,202 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 458 treesize of output 457 [2022-11-23 14:55:06,426 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 14:55:06,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:55:06,454 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:55:06,455 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 14:55:06,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:55:06,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:55:06,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:55:06,504 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:55:06,504 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 98 treesize of output 103 [2022-11-23 14:55:06,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:55:06,544 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:55:06,544 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 25 treesize of output 25 [2022-11-23 14:55:06,568 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:55:06,568 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 14:55:06,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:55:06,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:55:06,646 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:55:06,647 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 88 treesize of output 107 [2022-11-23 14:55:06,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:55:06,705 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:55:06,705 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 14:55:06,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:55:06,727 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:55:06,728 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 14:55:06,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:55:06,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:55:06,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:55:06,767 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:55:06,767 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 98 treesize of output 103 [2022-11-23 14:55:06,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:55:06,816 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:55:06,816 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 14:55:06,857 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:55:06,857 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 14:55:06,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:55:06,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:55:06,928 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:55:06,928 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 88 treesize of output 107 [2022-11-23 14:55:06,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:55:06,990 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:55:06,991 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 25 treesize of output 25 [2022-11-23 14:55:07,004 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:55:13,093 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11211#(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|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#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)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:55:13,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:55:13,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:55:13,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-23 14:55:13,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619133473] [2022-11-23 14:55:13,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:55:13,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-23 14:55:13,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:55:13,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-23 14:55:13,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-23 14:55:13,118 INFO L87 Difference]: Start difference. First operand 299 states and 304 transitions. Second operand has 405 states, 405 states have (on average 1.0296296296296297) internal successors, (417), 404 states have internal predecessors, (417), 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 14:55:15,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:55:15,682 INFO L93 Difference]: Finished difference Result 598 states and 809 transitions. [2022-11-23 14:55:15,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-23 14:55:15,683 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0296296296296297) internal successors, (417), 404 states have internal predecessors, (417), 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 297 [2022-11-23 14:55:15,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:55:15,686 INFO L225 Difference]: With dead ends: 598 [2022-11-23 14:55:15,686 INFO L226 Difference]: Without dead ends: 501 [2022-11-23 14:55:15,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1091 GetRequests, 660 SyntacticMatches, 23 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17684 ImplicationChecksByTransitivity, 69.3s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-23 14:55:15,694 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:55:15,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:55:15,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-11-23 14:55:15,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 501. [2022-11-23 14:55:15,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.012) internal successors, (506), 500 states have internal predecessors, (506), 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 14:55:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 506 transitions. [2022-11-23 14:55:15,715 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 506 transitions. Word has length 297 [2022-11-23 14:55:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:55:15,716 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 506 transitions. [2022-11-23 14:55:15,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0296296296296297) internal successors, (417), 404 states have internal predecessors, (417), 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 14:55:15,716 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 506 transitions. [2022-11-23 14:55:15,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2022-11-23 14:55:15,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:55:15,728 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:55:15,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 14:55:15,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 14:55:15,938 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:55:15,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:55:15,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1859959419, now seen corresponding path program 11 times [2022-11-23 14:55:15,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:55:15,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909276335] [2022-11-23 14:55:15,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:55:15,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:55:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:56:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 82015 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-23 14:56:58,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:56:58,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909276335] [2022-11-23 14:56:58,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909276335] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:56:58,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016675402] [2022-11-23 14:56:58,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:56:58,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:56:58,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:56:58,839 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:56:58,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 14:59:07,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-23 14:59:07,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:59:07,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-23 14:59:07,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:59:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 82015 backedges. 468 proven. 253 refuted. 0 times theorem prover too weak. 81294 trivial. 0 not checked. [2022-11-23 14:59:12,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:59:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 82015 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81762 trivial. 0 not checked. [2022-11-23 14:59:16,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016675402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:59:16,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [757513890] [2022-11-23 14:59:16,884 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 14:59:16,884 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:59:16,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:59:16,885 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:59:16,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:59:16,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:16,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:16,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:16,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:16,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:17,101 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 14:59:17,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 14:59:17,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:17,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:17,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:17,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:17,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:17,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-11-23 14:59:17,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:17,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:59:17,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:17,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:17,342 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:59:17,343 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 458 treesize of output 457 [2022-11-23 14:59:17,552 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 14:59:17,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:17,585 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:59:17,585 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 14:59:17,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:17,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:17,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:17,628 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:59:17,628 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 98 treesize of output 103 [2022-11-23 14:59:17,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:17,669 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:59:17,669 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 14:59:17,694 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:59:17,695 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 14:59:17,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:17,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:17,774 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:59:17,774 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 88 treesize of output 107 [2022-11-23 14:59:17,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:17,856 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:59:17,856 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 14:59:17,879 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:59:17,879 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 14:59:17,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:17,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:17,959 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:59:17,959 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 88 treesize of output 117 [2022-11-23 14:59:18,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:18,067 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:59:18,068 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 14:59:18,097 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:59:18,097 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 14:59:18,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:18,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:18,177 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:59:18,178 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 88 treesize of output 117 [2022-11-23 14:59:18,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:18,278 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:59:18,278 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 14:59:18,294 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:59:20,361 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16841#(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|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#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)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:59:20,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:59:20,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:59:20,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 27, 25] total 453 [2022-11-23 14:59:20,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231516724] [2022-11-23 14:59:20,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:59:20,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 453 states [2022-11-23 14:59:20,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:59:20,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 453 interpolants. [2022-11-23 14:59:20,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83401, Invalid=125905, Unknown=0, NotChecked=0, Total=209306 [2022-11-23 14:59:20,382 INFO L87 Difference]: Start difference. First operand 501 states and 506 transitions. Second operand has 453 states, 453 states have (on average 1.055187637969095) internal successors, (478), 453 states have internal predecessors, (478), 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 14:59:34,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:59:34,994 INFO L93 Difference]: Finished difference Result 695 states and 801 transitions. [2022-11-23 14:59:34,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 454 states. [2022-11-23 14:59:34,995 INFO L78 Accepts]: Start accepts. Automaton has has 453 states, 453 states have (on average 1.055187637969095) internal successors, (478), 453 states have internal predecessors, (478), 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 499 [2022-11-23 14:59:34,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:59:34,998 INFO L225 Difference]: With dead ends: 695 [2022-11-23 14:59:34,999 INFO L226 Difference]: Without dead ends: 598 [2022-11-23 14:59:35,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1994 GetRequests, 1490 SyntacticMatches, 0 SemanticMatches, 504 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23053 ImplicationChecksByTransitivity, 84.5s TimeCoverageRelationStatistics Valid=85802, Invalid=169728, Unknown=0, NotChecked=0, Total=255530 [2022-11-23 14:59:35,012 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 234 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:59:35,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 56 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 14:59:35,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-11-23 14:59:35,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2022-11-23 14:59:35,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 1.0100502512562815) internal successors, (603), 597 states have internal predecessors, (603), 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 14:59:35,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 603 transitions. [2022-11-23 14:59:35,042 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 603 transitions. Word has length 499 [2022-11-23 14:59:35,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:59:35,043 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 603 transitions. [2022-11-23 14:59:35,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 453 states, 453 states have (on average 1.055187637969095) internal successors, (478), 453 states have internal predecessors, (478), 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 14:59:35,044 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 603 transitions. [2022-11-23 14:59:35,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2022-11-23 14:59:35,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:59:35,049 INFO L195 NwaCegarLoop]: trace histogram [403, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:59:35,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 14:59:35,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 14:59:35,251 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:59:35,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:59:35,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1616233088, now seen corresponding path program 12 times [2022-11-23 14:59:35,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:59:35,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792143944] [2022-11-23 14:59:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:35,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:59:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:01:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 85730 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-11-23 15:01:28,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:01:28,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792143944] [2022-11-23 15:01:28,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792143944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:01:28,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620865081] [2022-11-23 15:01:28,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:01:28,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:01:28,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:01:28,631 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:01:28,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 15:01:30,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:01:30,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:01:30,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 5037 conjuncts, 405 conjunts are in the unsatisfiable core [2022-11-23 15:01:30,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:01:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 85730 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-11-23 15:01:30,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:04:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 85730 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-11-23 15:04:51,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620865081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:04:51,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [511913215] [2022-11-23 15:04:51,884 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 15:04:51,884 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:04:51,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:04:51,885 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:04:51,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:04:51,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:51,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:51,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:51,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:51,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:52,040 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-11-23 15:04:52,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 29 treesize of output 58 [2022-11-23 15:04:52,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:52,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:52,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:52,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:52,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:52,237 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 15:04:52,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 15:04:52,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:52,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 15:04:52,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:52,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:52,480 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 15:04:52,480 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 458 treesize of output 457 [2022-11-23 15:04:52,691 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 15:04:52,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:52,718 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:04:52,719 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 15:04:52,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:52,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:52,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:52,769 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:04:52,769 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 98 treesize of output 103 [2022-11-23 15:04:52,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:52,813 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:04:52,813 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 15:04:52,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:52,840 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:04:52,840 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 25 treesize of output 25 [2022-11-23 15:04:52,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:52,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:52,887 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:04:52,887 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 98 treesize of output 103 [2022-11-23 15:04:52,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:52,930 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:04:52,930 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 15:04:52,954 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:04:52,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:04:52,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:52,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:53,021 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:04:53,022 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 88 treesize of output 107 [2022-11-23 15:04:53,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:53,092 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:04:53,092 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 15:04:53,121 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:04:53,121 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 15:04:53,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:53,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:53,194 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:04:53,195 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 88 treesize of output 107 [2022-11-23 15:04:53,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:53,257 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:04:53,258 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 15:04:53,274 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:04:55,370 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23942#(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|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#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)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-23 15:04:55,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:04:55,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:04:55,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 405, 405] total 810 [2022-11-23 15:04:55,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809748595] [2022-11-23 15:04:55,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:04:55,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2022-11-23 15:04:55,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:04:55,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2022-11-23 15:04:55,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328475, Invalid=336565, Unknown=0, NotChecked=0, Total=665040 [2022-11-23 15:04:55,497 INFO L87 Difference]: Start difference. First operand 598 states and 603 transitions. Second operand has 811 states, 811 states have (on average 1.0147965474722564) internal successors, (823), 810 states have internal predecessors, (823), 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 15:05:13,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:05:13,321 INFO L93 Difference]: Finished difference Result 1196 states and 1610 transitions. [2022-11-23 15:05:13,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2022-11-23 15:05:13,322 INFO L78 Accepts]: Start accepts. Automaton has has 811 states, 811 states have (on average 1.0147965474722564) internal successors, (823), 810 states have internal predecessors, (823), 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 596 [2022-11-23 15:05:13,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:05:13,327 INFO L225 Difference]: With dead ends: 1196 [2022-11-23 15:05:13,327 INFO L226 Difference]: Without dead ends: 1003 [2022-11-23 15:05:13,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2191 GetRequests, 1377 SyntacticMatches, 0 SemanticMatches, 814 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7672 ImplicationChecksByTransitivity, 266.2s TimeCoverageRelationStatistics Valid=328475, Invalid=336565, Unknown=0, NotChecked=0, Total=665040 [2022-11-23 15:05:13,362 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:05:13,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 15:05:13,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-11-23 15:05:13,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 1003. [2022-11-23 15:05:13,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 1.0059880239520957) internal successors, (1008), 1002 states have internal predecessors, (1008), 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 15:05:13,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1008 transitions. [2022-11-23 15:05:13,414 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1008 transitions. Word has length 596 [2022-11-23 15:05:13,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:05:13,415 INFO L495 AbstractCegarLoop]: Abstraction has 1003 states and 1008 transitions. [2022-11-23 15:05:13,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 811 states, 811 states have (on average 1.0147965474722564) internal successors, (823), 810 states have internal predecessors, (823), 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 15:05:13,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1008 transitions. [2022-11-23 15:05:13,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1002 [2022-11-23 15:05:13,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:05:13,427 INFO L195 NwaCegarLoop]: trace histogram [808, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:05:13,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 15:05:13,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cb76f1-e4c5-453b-956c-5af86c2033cd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:05:13,645 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:05:13,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:05:13,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1108356133, now seen corresponding path program 13 times [2022-11-23 15:05:13,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:05:13,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102122785] [2022-11-23 15:05:13,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:13,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:05:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat