./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_two_index_05.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_two_index_05.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9 --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 3fc114fbbcfc36c9c941771d8fca06798b1529d5817554239fb5f8a03a84a489 --- 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-6b4ec56 [2022-11-20 18:55:50,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 18:55:50,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 18:55:50,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 18:55:50,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 18:55:50,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 18:55:50,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 18:55:50,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 18:55:50,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 18:55:50,925 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 18:55:50,926 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 18:55:50,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 18:55:50,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 18:55:50,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 18:55:50,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 18:55:50,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 18:55:50,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 18:55:50,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 18:55:50,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 18:55:50,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 18:55:50,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 18:55:50,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 18:55:50,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 18:55:50,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 18:55:50,950 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 18:55:50,950 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 18:55:50,951 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 18:55:50,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 18:55:50,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 18:55:50,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 18:55:50,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 18:55:50,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 18:55:50,957 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 18:55:50,958 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 18:55:50,959 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 18:55:50,960 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 18:55:50,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 18:55:50,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 18:55:50,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 18:55:50,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 18:55:50,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 18:55:50,965 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 18:55:50,994 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 18:55:50,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 18:55:50,995 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 18:55:50,995 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 18:55:50,995 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 18:55:50,996 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 18:55:50,996 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 18:55:50,996 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 18:55:50,997 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 18:55:50,997 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 18:55:50,997 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 18:55:50,997 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 18:55:50,998 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 18:55:50,998 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 18:55:50,998 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 18:55:50,998 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 18:55:50,999 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 18:55:50,999 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 18:55:51,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 18:55:51,000 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 18:55:51,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 18:55:51,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 18:55:51,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 18:55:51,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 18:55:51,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 18:55:51,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 18:55:51,002 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 18:55:51,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 18:55:51,002 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 18:55:51,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 18:55:51,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 18:55:51,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 18:55:51,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 18:55:51,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 18:55:51,004 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 18:55:51,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 18:55:51,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 18:55:51,005 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 18:55:51,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 18:55:51,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 18:55:51,006 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 18:55:51,006 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_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3fc114fbbcfc36c9c941771d8fca06798b1529d5817554239fb5f8a03a84a489 [2022-11-20 18:55:51,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 18:55:51,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 18:55:51,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 18:55:51,380 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 18:55:51,380 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 18:55:51,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/array-examples/standard_two_index_05.i [2022-11-20 18:55:54,902 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 18:55:55,154 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 18:55:55,157 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/sv-benchmarks/c/array-examples/standard_two_index_05.i [2022-11-20 18:55:55,164 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/data/2d21948a7/8781353aa0d941ba883c62a0fae68693/FLAGe179f4f0f [2022-11-20 18:55:55,187 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/data/2d21948a7/8781353aa0d941ba883c62a0fae68693 [2022-11-20 18:55:55,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 18:55:55,202 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 18:55:55,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 18:55:55,208 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 18:55:55,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 18:55:55,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:55:55" (1/1) ... [2022-11-20 18:55:55,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40c548b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:55, skipping insertion in model container [2022-11-20 18:55:55,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:55:55" (1/1) ... [2022-11-20 18:55:55,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 18:55:55,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 18:55:55,390 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_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/sv-benchmarks/c/array-examples/standard_two_index_05.i[814,827] [2022-11-20 18:55:55,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 18:55:55,410 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 18:55:55,424 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_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/sv-benchmarks/c/array-examples/standard_two_index_05.i[814,827] [2022-11-20 18:55:55,432 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 18:55:55,447 INFO L208 MainTranslator]: Completed translation [2022-11-20 18:55:55,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:55 WrapperNode [2022-11-20 18:55:55,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 18:55:55,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 18:55:55,449 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 18:55:55,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 18:55:55,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:55" (1/1) ... [2022-11-20 18:55:55,468 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:55" (1/1) ... [2022-11-20 18:55:55,494 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-11-20 18:55:55,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 18:55:55,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 18:55:55,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 18:55:55,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 18:55:55,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:55" (1/1) ... [2022-11-20 18:55:55,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:55" (1/1) ... [2022-11-20 18:55:55,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:55" (1/1) ... [2022-11-20 18:55:55,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:55" (1/1) ... [2022-11-20 18:55:55,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:55" (1/1) ... [2022-11-20 18:55:55,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:55" (1/1) ... [2022-11-20 18:55:55,538 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:55" (1/1) ... [2022-11-20 18:55:55,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:55" (1/1) ... [2022-11-20 18:55:55,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 18:55:55,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 18:55:55,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 18:55:55,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 18:55:55,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:55" (1/1) ... [2022-11-20 18:55:55,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 18:55:55,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:55:55,590 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 18:55:55,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 18:55:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 18:55:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 18:55:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 18:55:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 18:55:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 18:55:55,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 18:55:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 18:55:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 18:55:55,740 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 18:55:55,743 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 18:55:55,969 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 18:55:56,006 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 18:55:56,006 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 18:55:56,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:55:56 BoogieIcfgContainer [2022-11-20 18:55:56,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 18:55:56,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 18:55:56,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 18:55:56,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 18:55:56,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:55:55" (1/3) ... [2022-11-20 18:55:56,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8a265b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:55:56, skipping insertion in model container [2022-11-20 18:55:56,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:55" (2/3) ... [2022-11-20 18:55:56,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8a265b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:55:56, skipping insertion in model container [2022-11-20 18:55:56,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:55:56" (3/3) ... [2022-11-20 18:55:56,040 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_05.i [2022-11-20 18:55:56,064 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 18:55:56,064 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 18:55:56,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 18:55:56,149 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;@d466a03, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 18:55:56,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 18:55:56,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:55:56,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 18:55:56,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:55:56,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 18:55:56,164 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:55:56,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:55:56,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1776518481, now seen corresponding path program 1 times [2022-11-20 18:55:56,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:55:56,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816027275] [2022-11-20 18:55:56,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:55:56,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:55:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:55:56,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:55:56,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:55:56,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816027275] [2022-11-20 18:55:56,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816027275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:55:56,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:55:56,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 18:55:56,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965665619] [2022-11-20 18:55:56,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:55:56,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 18:55:56,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:55:56,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 18:55:56,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:55:56,498 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:55:56,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:55:56,536 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2022-11-20 18:55:56,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 18:55:56,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 18:55:56,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:55:56,546 INFO L225 Difference]: With dead ends: 17 [2022-11-20 18:55:56,546 INFO L226 Difference]: Without dead ends: 9 [2022-11-20 18:55:56,549 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 [2022-11-20 18:55:56,553 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 18:55:56,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 18:55:56,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-20 18:55:56,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-20 18:55:56,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:55:56,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-11-20 18:55:56,618 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2022-11-20 18:55:56,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:55:56,619 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-11-20 18:55:56,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:55:56,634 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-11-20 18:55:56,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 18:55:56,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:55:56,635 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:55:56,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 18:55:56,636 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:55:56,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:55:56,637 INFO L85 PathProgramCache]: Analyzing trace with hash -612832272, now seen corresponding path program 1 times [2022-11-20 18:55:56,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:55:56,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612891799] [2022-11-20 18:55:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:55:56,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:55:56,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:55:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:55:56,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:55:56,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612891799] [2022-11-20 18:55:56,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612891799] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:55:56,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857889410] [2022-11-20 18:55:56,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:55:56,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:55:56,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:55:56,850 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:55:56,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 18:55:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:55:56,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 18:55:56,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:55:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 18:55:57,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:55:57,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857889410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:55:57,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 18:55:57,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-20 18:55:57,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256854487] [2022-11-20 18:55:57,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:55:57,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 18:55:57,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:55:57,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 18:55:57,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 18:55:57,017 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:55:57,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:55:57,071 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-11-20 18:55:57,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 18:55:57,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 18:55:57,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:55:57,075 INFO L225 Difference]: With dead ends: 20 [2022-11-20 18:55:57,076 INFO L226 Difference]: Without dead ends: 15 [2022-11-20 18:55:57,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 18:55:57,078 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 18:55:57,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 18:55:57,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-20 18:55:57,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2022-11-20 18:55:57,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:55:57,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-20 18:55:57,084 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2022-11-20 18:55:57,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:55:57,084 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-20 18:55:57,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:55:57,085 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-20 18:55:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 18:55:57,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:55:57,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:55:57,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 18:55:57,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:55:57,296 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:55:57,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:55:57,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1851389444, now seen corresponding path program 1 times [2022-11-20 18:55:57,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:55:57,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561840357] [2022-11-20 18:55:57,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:55:57,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:55:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:55:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 18:55:57,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:55:57,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561840357] [2022-11-20 18:55:57,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561840357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:55:57,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657952185] [2022-11-20 18:55:57,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:55:57,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:55:57,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:55:57,374 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:55:57,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 18:55:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:55:57,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 18:55:57,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:55:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 18:55:57,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:55:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 18:55:57,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657952185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:55:57,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1405337431] [2022-11-20 18:55:57,552 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 18:55:57,552 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:55:57,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:55:57,565 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:55:57,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 18:55:57,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:57,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:57,766 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-20 18:55:57,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-20 18:55:57,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:57,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:57,901 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-20 18:55:57,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-20 18:55:57,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:57,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 18:55:58,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:58,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:58,226 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-20 18:55:58,227 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 248 treesize of output 247 [2022-11-20 18:55:58,512 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 [2022-11-20 18:55:58,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:58,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-20 18:55:58,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:58,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:58,654 INFO L321 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-11-20 18:55:58,654 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 6 case distinctions, treesize of input 78 treesize of output 103 [2022-11-20 18:55:58,778 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-20 18:55:58,779 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 [2022-11-20 18:55:58,799 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 18:55:59,014 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '164#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 20) 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 18:55:59,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 18:55:59,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 18:55:59,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-20 18:55:59,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763087528] [2022-11-20 18:55:59,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 18:55:59,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 18:55:59,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:55:59,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 18:55:59,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-11-20 18:55:59,018 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:55:59,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:55:59,064 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-11-20 18:55:59,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 18:55:59,065 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 18:55:59,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:55:59,066 INFO L225 Difference]: With dead ends: 31 [2022-11-20 18:55:59,066 INFO L226 Difference]: Without dead ends: 24 [2022-11-20 18:55:59,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-11-20 18:55:59,068 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 18:55:59,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 18:55:59,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-20 18:55:59,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2022-11-20 18:55:59,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:55:59,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-20 18:55:59,081 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-11-20 18:55:59,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:55:59,081 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-20 18:55:59,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:55:59,082 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-20 18:55:59,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 18:55:59,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:55:59,083 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 18:55:59,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 18:55:59,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:55:59,290 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:55:59,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:55:59,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1413922641, now seen corresponding path program 2 times [2022-11-20 18:55:59,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:55:59,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149773774] [2022-11-20 18:55:59,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:55:59,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:55:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:55:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 18:55:59,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:55:59,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149773774] [2022-11-20 18:55:59,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149773774] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:55:59,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621764936] [2022-11-20 18:55:59,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 18:55:59,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:55:59,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:55:59,455 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:55:59,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 18:55:59,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 18:55:59,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 18:55:59,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 18:55:59,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:55:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 18:55:59,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:55:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 18:55:59,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621764936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:55:59,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [683416183] [2022-11-20 18:55:59,607 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 18:55:59,607 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:55:59,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:55:59,608 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:55:59,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 18:55:59,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:59,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:59,668 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-20 18:55:59,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-20 18:55:59,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:59,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:59,752 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-20 18:55:59,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-20 18:55:59,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:59,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 18:55:59,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:59,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:59,976 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-20 18:55:59,976 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 248 treesize of output 247 [2022-11-20 18:56:00,116 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 [2022-11-20 18:56:00,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:00,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-11-20 18:56:00,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:00,250 INFO L321 Elim1Store]: treesize reduction 109, result has 33.5 percent of original size [2022-11-20 18:56:00,251 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 5 case distinctions, treesize of input 81 treesize of output 109 [2022-11-20 18:56:00,374 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-20 18:56:00,374 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 [2022-11-20 18:56:00,391 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 18:56:00,546 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '312#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 20) 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 18:56:00,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 18:56:00,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 18:56:00,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-20 18:56:00,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040528569] [2022-11-20 18:56:00,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 18:56:00,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 18:56:00,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:56:00,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 18:56:00,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-11-20 18:56:00,548 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:56:00,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:56:00,637 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-11-20 18:56:00,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 18:56:00,638 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 18:56:00,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:56:00,638 INFO L225 Difference]: With dead ends: 54 [2022-11-20 18:56:00,639 INFO L226 Difference]: Without dead ends: 46 [2022-11-20 18:56:00,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-11-20 18:56:00,640 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:56:00,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 18 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 18:56:00,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-20 18:56:00,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 20. [2022-11-20 18:56:00,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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) [2022-11-20 18:56:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-11-20 18:56:00,645 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2022-11-20 18:56:00,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:56:00,646 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-11-20 18:56:00,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:56:00,646 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-11-20 18:56:00,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 18:56:00,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:56:00,647 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2022-11-20 18:56:00,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 18:56:00,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:56:00,852 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:56:00,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:56:00,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1373793359, now seen corresponding path program 3 times [2022-11-20 18:56:00,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:56:00,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579582151] [2022-11-20 18:56:00,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:00,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:56:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 18:56:01,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:56:01,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579582151] [2022-11-20 18:56:01,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579582151] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:56:01,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120158381] [2022-11-20 18:56:01,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 18:56:01,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:56:01,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:56:01,190 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:56:01,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 18:56:01,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 18:56:01,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 18:56:01,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 18:56:01,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:56:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 18:56:01,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:56:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 18:56:01,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120158381] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:56:01,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1190598696] [2022-11-20 18:56:01,534 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 18:56:01,534 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:56:01,535 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:56:01,535 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:56:01,535 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 18:56:01,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:01,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:01,622 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-20 18:56:01,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-20 18:56:01,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:01,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:01,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-20 18:56:01,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:01,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-20 18:56:01,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:01,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:01,829 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-20 18:56:01,830 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 258 treesize of output 246 [2022-11-20 18:56:01,918 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 [2022-11-20 18:56:01,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:01,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 18:56:02,049 INFO L321 Elim1Store]: treesize reduction 119, result has 26.1 percent of original size [2022-11-20 18:56:02,050 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 86 treesize of output 108 [2022-11-20 18:56:02,134 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-20 18:56:02,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 18:56:02,153 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 18:56:02,428 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '555#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 20) 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 18:56:02,428 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 18:56:02,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 18:56:02,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2022-11-20 18:56:02,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171902626] [2022-11-20 18:56:02,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 18:56:02,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 18:56:02,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:56:02,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 18:56:02,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=396, Unknown=0, NotChecked=0, Total=702 [2022-11-20 18:56:02,431 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:56:02,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:56:02,642 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2022-11-20 18:56:02,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 18:56:02,643 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-20 18:56:02,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:56:02,645 INFO L225 Difference]: With dead ends: 93 [2022-11-20 18:56:02,646 INFO L226 Difference]: Without dead ends: 81 [2022-11-20 18:56:02,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=306, Invalid=396, Unknown=0, NotChecked=0, Total=702 [2022-11-20 18:56:02,649 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 79 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 18:56:02,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 48 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 18:56:02,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-20 18:56:02,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 36. [2022-11-20 18:56:02,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 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) [2022-11-20 18:56:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-11-20 18:56:02,659 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 18 [2022-11-20 18:56:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:56:02,659 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-11-20 18:56:02,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:56:02,660 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-11-20 18:56:02,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 18:56:02,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:56:02,661 INFO L195 NwaCegarLoop]: trace histogram [19, 9, 1, 1, 1, 1, 1, 1] [2022-11-20 18:56:02,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 18:56:02,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:56:02,863 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:56:02,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:56:02,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1806525724, now seen corresponding path program 4 times [2022-11-20 18:56:02,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:56:02,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587914703] [2022-11-20 18:56:02,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:02,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:56:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-20 18:56:03,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:56:03,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587914703] [2022-11-20 18:56:03,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587914703] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:56:03,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372145692] [2022-11-20 18:56:03,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 18:56:03,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:56:03,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:56:03,197 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:56:03,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 18:56:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:03,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 18:56:03,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:56:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 18:56:03,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:56:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 18:56:04,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372145692] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:56:04,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1375297105] [2022-11-20 18:56:04,180 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 18:56:04,180 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:56:04,181 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:56:04,181 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:56:04,181 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 18:56:04,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:04,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:04,254 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-20 18:56:04,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-20 18:56:04,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:04,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:04,328 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-20 18:56:04,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-20 18:56:04,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:04,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-20 18:56:04,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:04,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:04,493 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-20 18:56:04,493 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 258 treesize of output 246 [2022-11-20 18:56:04,601 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 [2022-11-20 18:56:04,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:04,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-20 18:56:04,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:04,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:04,736 INFO L321 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-11-20 18:56:04,736 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 6 case distinctions, treesize of input 78 treesize of output 103 [2022-11-20 18:56:04,844 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-20 18:56:04,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 18:56:04,860 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 18:56:05,136 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1015#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 20) 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 18:56:05,137 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 18:56:05,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 18:56:05,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 21] total 49 [2022-11-20 18:56:05,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624322617] [2022-11-20 18:56:05,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 18:56:05,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 18:56:05,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:56:05,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 18:56:05,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1332, Invalid=1530, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 18:56:05,141 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 49 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:56:05,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:56:05,525 INFO L93 Difference]: Finished difference Result 153 states and 188 transitions. [2022-11-20 18:56:05,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 18:56:05,526 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-20 18:56:05,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:56:05,528 INFO L225 Difference]: With dead ends: 153 [2022-11-20 18:56:05,528 INFO L226 Difference]: Without dead ends: 138 [2022-11-20 18:56:05,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1332, Invalid=1530, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 18:56:05,530 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 203 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 18:56:05,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 78 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 18:56:05,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-20 18:56:05,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 68. [2022-11-20 18:56:05,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 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) [2022-11-20 18:56:05,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2022-11-20 18:56:05,542 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 34 [2022-11-20 18:56:05,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:56:05,542 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2022-11-20 18:56:05,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:56:05,543 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2022-11-20 18:56:05,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-20 18:56:05,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:56:05,545 INFO L195 NwaCegarLoop]: trace histogram [46, 14, 1, 1, 1, 1, 1, 1] [2022-11-20 18:56:05,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 18:56:05,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 18:56:05,752 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:56:05,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:56:05,752 INFO L85 PathProgramCache]: Analyzing trace with hash 148264399, now seen corresponding path program 5 times [2022-11-20 18:56:05,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:56:05,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158425324] [2022-11-20 18:56:05,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:05,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:56:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-20 18:56:06,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:56:06,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158425324] [2022-11-20 18:56:06,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158425324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:56:06,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136488856] [2022-11-20 18:56:06,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 18:56:06,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:56:06,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:56:06,659 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:56:06,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 18:56:11,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-20 18:56:11,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 18:56:11,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 18:56:11,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:56:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-20 18:56:11,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:56:11,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-20 18:56:11,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136488856] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:56:11,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1120220726] [2022-11-20 18:56:11,632 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 18:56:11,632 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:56:11,632 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:56:11,632 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:56:11,632 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 18:56:11,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:11,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:11,708 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-20 18:56:11,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-20 18:56:11,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:11,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:11,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-20 18:56:11,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:11,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 18:56:11,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:11,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:56:11,891 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-20 18:56:11,892 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 248 treesize of output 247 [2022-11-20 18:56:12,038 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 [2022-11-20 18:56:12,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:12,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-11-20 18:56:12,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:12,195 INFO L321 Elim1Store]: treesize reduction 109, result has 33.5 percent of original size [2022-11-20 18:56:12,196 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 5 case distinctions, treesize of input 81 treesize of output 109 [2022-11-20 18:56:12,282 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-20 18:56:12,283 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 [2022-11-20 18:56:12,297 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 18:56:12,472 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1815#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 20) 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 18:56:12,472 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 18:56:12,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 18:56:12,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-11-20 18:56:12,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648926923] [2022-11-20 18:56:12,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 18:56:12,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 18:56:12,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:56:12,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 18:56:12,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=766, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 18:56:12,476 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 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) [2022-11-20 18:56:12,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:56:12,858 INFO L93 Difference]: Finished difference Result 235 states and 253 transitions. [2022-11-20 18:56:12,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 18:56:12,859 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 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 66 [2022-11-20 18:56:12,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:56:12,861 INFO L225 Difference]: With dead ends: 235 [2022-11-20 18:56:12,861 INFO L226 Difference]: Without dead ends: 230 [2022-11-20 18:56:12,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=640, Invalid=766, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 18:56:12,863 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 372 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 18:56:12,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 90 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 18:56:12,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-20 18:56:12,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 84. [2022-11-20 18:56:12,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 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) [2022-11-20 18:56:12,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2022-11-20 18:56:12,876 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 66 [2022-11-20 18:56:12,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:56:12,877 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2022-11-20 18:56:12,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 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) [2022-11-20 18:56:12,877 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2022-11-20 18:56:12,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-20 18:56:12,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:56:12,879 INFO L195 NwaCegarLoop]: trace histogram [46, 30, 1, 1, 1, 1, 1, 1] [2022-11-20 18:56:12,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 18:56:13,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:56:13,080 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:56:13,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:56:13,081 INFO L85 PathProgramCache]: Analyzing trace with hash -812104753, now seen corresponding path program 6 times [2022-11-20 18:56:13,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:56:13,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347673979] [2022-11-20 18:56:13,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:13,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:56:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-20 18:56:14,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:56:14,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347673979] [2022-11-20 18:56:14,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347673979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:56:14,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121707522] [2022-11-20 18:56:14,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 18:56:14,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:56:14,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:56:14,776 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:56:14,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 18:56:15,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 18:56:15,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 18:56:15,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-20 18:56:15,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:56:15,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-11-20 18:56:15,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:56:18,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-11-20 18:56:18,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121707522] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:56:18,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2140485885] [2022-11-20 18:56:18,639 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 18:56:18,640 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:56:18,640 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:56:18,640 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:56:18,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 18:56:18,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:18,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:18,699 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-20 18:56:18,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-20 18:56:18,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:18,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:18,762 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-20 18:56:18,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-20 18:56:18,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:18,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-20 18:56:18,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:18,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:18,873 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-20 18:56:18,874 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 258 treesize of output 246 [2022-11-20 18:56:18,942 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 [2022-11-20 18:56:18,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:18,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 18:56:19,047 INFO L321 Elim1Store]: treesize reduction 119, result has 26.1 percent of original size [2022-11-20 18:56:19,049 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 86 treesize of output 108 [2022-11-20 18:56:19,134 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-20 18:56:19,137 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 [2022-11-20 18:56:19,149 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 18:56:19,417 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2932#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 20) 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 18:56:19,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 18:56:19,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 18:56:19,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 48, 48] total 118 [2022-11-20 18:56:19,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077876345] [2022-11-20 18:56:19,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 18:56:19,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-11-20 18:56:19,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:56:19,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-11-20 18:56:19,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7266, Invalid=7740, Unknown=0, NotChecked=0, Total=15006 [2022-11-20 18:56:19,429 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 118 states, 118 states have (on average 1.1440677966101696) internal successors, (135), 118 states have internal predecessors, (135), 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) [2022-11-20 18:56:21,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:56:21,181 INFO L93 Difference]: Finished difference Result 405 states and 488 transitions. [2022-11-20 18:56:21,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-11-20 18:56:21,182 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.1440677966101696) internal successors, (135), 118 states have internal predecessors, (135), 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 82 [2022-11-20 18:56:21,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:56:21,183 INFO L225 Difference]: With dead ends: 405 [2022-11-20 18:56:21,184 INFO L226 Difference]: Without dead ends: 369 [2022-11-20 18:56:21,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7851 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=7266, Invalid=7740, Unknown=0, NotChecked=0, Total=15006 [2022-11-20 18:56:21,190 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 935 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 18:56:21,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [935 Valid, 195 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 18:56:21,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-11-20 18:56:21,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 164. [2022-11-20 18:56:21,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.01840490797546) internal successors, (166), 163 states have internal predecessors, (166), 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) [2022-11-20 18:56:21,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2022-11-20 18:56:21,207 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 82 [2022-11-20 18:56:21,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:56:21,208 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2022-11-20 18:56:21,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.1440677966101696) internal successors, (135), 118 states have internal predecessors, (135), 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) [2022-11-20 18:56:21,208 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2022-11-20 18:56:21,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-20 18:56:21,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:56:21,211 INFO L195 NwaCegarLoop]: trace histogram [115, 41, 1, 1, 1, 1, 1, 1] [2022-11-20 18:56:21,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 18:56:21,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:56:21,417 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:56:21,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:56:21,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1244140316, now seen corresponding path program 7 times [2022-11-20 18:56:21,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:56:21,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136765677] [2022-11-20 18:56:21,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:21,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:56:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7531 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 6670 trivial. 0 not checked. [2022-11-20 18:56:24,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:56:24,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136765677] [2022-11-20 18:56:24,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136765677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:56:24,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622482330] [2022-11-20 18:56:24,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 18:56:24,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:56:24,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:56:24,631 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:56:24,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 18:56:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:25,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 1473 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-20 18:56:25,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:56:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7531 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-11-20 18:56:27,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:56:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7531 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-11-20 18:56:39,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622482330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:56:39,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [273289213] [2022-11-20 18:56:39,114 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 18:56:39,114 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:56:39,114 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:56:39,114 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:56:39,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 18:56:39,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:39,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:39,184 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-20 18:56:39,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-20 18:56:39,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:39,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:39,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-20 18:56:39,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:39,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-20 18:56:39,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:39,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:39,318 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-20 18:56:39,319 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 258 treesize of output 246 [2022-11-20 18:56:39,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 18:56:39,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:39,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-20 18:56:39,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:39,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:39,508 INFO L321 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-11-20 18:56:39,508 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 6 case distinctions, treesize of input 78 treesize of output 103 [2022-11-20 18:56:39,681 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-20 18:56:39,682 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 [2022-11-20 18:56:39,696 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 18:56:39,988 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5117#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 20) 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 18:56:39,988 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 18:56:39,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 18:56:39,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 117, 117] total 254 [2022-11-20 18:56:39,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766774848] [2022-11-20 18:56:39,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 18:56:39,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 254 states [2022-11-20 18:56:39,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:56:40,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 254 interpolants. [2022-11-20 18:56:40,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32902, Invalid=33920, Unknown=0, NotChecked=0, Total=66822 [2022-11-20 18:56:40,009 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand has 254 states, 254 states have (on average 1.1181102362204725) internal successors, (284), 254 states have internal predecessors, (284), 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) [2022-11-20 18:56:49,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:56:49,317 INFO L93 Difference]: Finished difference Result 698 states and 862 transitions. [2022-11-20 18:56:49,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 254 states. [2022-11-20 18:56:49,318 INFO L78 Accepts]: Start accepts. Automaton has has 254 states, 254 states have (on average 1.1181102362204725) internal successors, (284), 254 states have internal predecessors, (284), 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 162 [2022-11-20 18:56:49,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:56:49,322 INFO L225 Difference]: With dead ends: 698 [2022-11-20 18:56:49,322 INFO L226 Difference]: Without dead ends: 651 [2022-11-20 18:56:49,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38173 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=32902, Invalid=33920, Unknown=0, NotChecked=0, Total=66822 [2022-11-20 18:56:49,329 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1380 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 1121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1380 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1121 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 18:56:49,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1380 Valid, 375 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1121 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 18:56:49,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-11-20 18:56:49,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 325. [2022-11-20 18:56:49,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.0092592592592593) internal successors, (327), 324 states have internal predecessors, (327), 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) [2022-11-20 18:56:49,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 327 transitions. [2022-11-20 18:56:49,362 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 327 transitions. Word has length 162 [2022-11-20 18:56:49,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:56:49,363 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 327 transitions. [2022-11-20 18:56:49,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 254 states, 254 states have (on average 1.1181102362204725) internal successors, (284), 254 states have internal predecessors, (284), 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) [2022-11-20 18:56:49,364 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 327 transitions. [2022-11-20 18:56:49,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-11-20 18:56:49,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:56:49,371 INFO L195 NwaCegarLoop]: trace histogram [251, 66, 1, 1, 1, 1, 1, 1] [2022-11-20 18:56:49,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 18:56:49,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:56:49,580 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:56:49,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:56:49,581 INFO L85 PathProgramCache]: Analyzing trace with hash -810757680, now seen corresponding path program 8 times [2022-11-20 18:56:49,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:56:49,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556643897] [2022-11-20 18:56:49,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:49,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:56:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 33837 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 31626 trivial. 0 not checked. [2022-11-20 18:56:58,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:56:58,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556643897] [2022-11-20 18:56:58,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556643897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:56:58,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100338201] [2022-11-20 18:56:58,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 18:56:58,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:56:58,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:56:58,365 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:56:58,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee1c1ca-27d4-4433-b586-8b8069cb5e7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process