./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur --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 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 --- 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-38b53e6 [2022-11-25 22:24:39,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:24:39,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:24:39,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:24:39,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:24:39,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:24:39,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:24:39,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:24:39,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:24:39,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:24:39,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:24:39,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:24:39,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:24:39,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:24:39,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:24:39,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:24:39,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:24:39,095 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:24:39,097 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:24:39,099 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:24:39,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:24:39,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:24:39,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:24:39,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:24:39,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:24:39,111 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:24:39,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:24:39,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:24:39,113 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:24:39,114 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:24:39,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:24:39,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:24:39,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:24:39,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:24:39,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:24:39,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:24:39,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:24:39,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:24:39,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:24:39,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:24:39,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:24:39,126 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:24:39,161 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:24:39,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:24:39,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:24:39,164 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:24:39,165 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:24:39,167 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:24:39,168 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:24:39,168 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:24:39,168 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:24:39,169 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:24:39,170 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:24:39,170 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:24:39,171 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:24:39,171 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:24:39,171 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:24:39,172 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:24:39,172 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:24:39,172 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:24:39,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:24:39,174 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:24:39,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:24:39,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:24:39,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:24:39,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:24:39,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:24:39,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:24:39,177 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:24:39,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:24:39,178 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:24:39,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:24:39,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:24:39,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:24:39,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:24:39,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:24:39,181 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:24:39,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:24:39,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:24:39,182 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:24:39,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:24:39,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:24:39,183 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:24:39,183 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_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 [2022-11-25 22:24:39,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:24:39,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:24:39,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:24:39,604 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:24:39,605 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:24:39,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2022-11-25 22:24:42,763 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:24:43,042 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:24:43,043 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2022-11-25 22:24:43,052 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/data/e4929585f/b5c06604539e462f9e64b49aba87ba0b/FLAG395b0b3a7 [2022-11-25 22:24:43,072 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/data/e4929585f/b5c06604539e462f9e64b49aba87ba0b [2022-11-25 22:24:43,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:24:43,082 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:24:43,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:24:43,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:24:43,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:24:43,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:24:43" (1/1) ... [2022-11-25 22:24:43,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6144df1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:43, skipping insertion in model container [2022-11-25 22:24:43,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:24:43" (1/1) ... [2022-11-25 22:24:43,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:24:43,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:24:43,336 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_2431f03f-459d-4abf-aeb4-376bdf168926/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2022-11-25 22:24:43,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:24:43,367 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:24:43,387 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_2431f03f-459d-4abf-aeb4-376bdf168926/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2022-11-25 22:24:43,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:24:43,458 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:24:43,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:43 WrapperNode [2022-11-25 22:24:43,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:24:43,461 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:24:43,462 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:24:43,462 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:24:43,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:43" (1/1) ... [2022-11-25 22:24:43,493 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:43" (1/1) ... [2022-11-25 22:24:43,512 INFO L138 Inliner]: procedures = 15, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2022-11-25 22:24:43,513 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:24:43,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:24:43,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:24:43,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:24:43,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:43" (1/1) ... [2022-11-25 22:24:43,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:43" (1/1) ... [2022-11-25 22:24:43,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:43" (1/1) ... [2022-11-25 22:24:43,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:43" (1/1) ... [2022-11-25 22:24:43,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:43" (1/1) ... [2022-11-25 22:24:43,539 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:43" (1/1) ... [2022-11-25 22:24:43,541 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:43" (1/1) ... [2022-11-25 22:24:43,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:43" (1/1) ... [2022-11-25 22:24:43,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:24:43,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:24:43,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:24:43,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:24:43,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:43" (1/1) ... [2022-11-25 22:24:43,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:24:43,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:24:43,596 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:24:43,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:24:43,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:24:43,653 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 22:24:43,653 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 22:24:43,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:24:43,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 22:24:43,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 22:24:43,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:24:43,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:24:43,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 22:24:43,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 22:24:43,763 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:24:43,766 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:24:44,053 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:24:44,162 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:24:44,163 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 22:24:44,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:24:44 BoogieIcfgContainer [2022-11-25 22:24:44,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:24:44,169 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:24:44,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:24:44,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:24:44,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:24:43" (1/3) ... [2022-11-25 22:24:44,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@312cd1ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:24:44, skipping insertion in model container [2022-11-25 22:24:44,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:43" (2/3) ... [2022-11-25 22:24:44,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@312cd1ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:24:44, skipping insertion in model container [2022-11-25 22:24:44,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:24:44" (3/3) ... [2022-11-25 22:24:44,176 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr2.c [2022-11-25 22:24:44,199 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:24:44,200 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:24:44,255 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:24:44,264 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;@60af6f56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:24:44,264 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:24:44,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:24:44,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 22:24:44,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:24:44,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 22:24:44,279 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:24:44,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:24:44,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1033138693, now seen corresponding path program 1 times [2022-11-25 22:24:44,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:24:44,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645410771] [2022-11-25 22:24:44,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:44,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:24:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:24:44,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:24:44,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645410771] [2022-11-25 22:24:44,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645410771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:24:44,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:24:44,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:24:44,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473524494] [2022-11-25 22:24:44,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:24:44,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:24:44,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:24:44,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:24:44,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:24:44,655 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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) [2022-11-25 22:24:44,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:24:44,723 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2022-11-25 22:24:44,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:24:44,727 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 [2022-11-25 22:24:44,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:24:44,734 INFO L225 Difference]: With dead ends: 27 [2022-11-25 22:24:44,734 INFO L226 Difference]: Without dead ends: 19 [2022-11-25 22:24:44,737 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 [2022-11-25 22:24:44,741 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:24:44,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:24:44,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-25 22:24:44,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2022-11-25 22:24:44,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:24:44,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-11-25 22:24:44,791 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 6 [2022-11-25 22:24:44,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:24:44,792 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-11-25 22:24:44,793 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) [2022-11-25 22:24:44,793 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-11-25 22:24:44,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 22:24:44,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:24:44,796 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:24:44,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:24:44,798 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:24:44,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:24:44,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1201809854, now seen corresponding path program 1 times [2022-11-25 22:24:44,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:24:44,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650406322] [2022-11-25 22:24:44,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:44,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:24:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 22:24:45,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:24:45,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650406322] [2022-11-25 22:24:45,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650406322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:24:45,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:24:45,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:24:45,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314410363] [2022-11-25 22:24:45,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:24:45,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:24:45,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:24:45,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:24:45,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:24:45,109 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 22:24:45,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:24:45,218 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2022-11-25 22:24:45,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:24:45,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2022-11-25 22:24:45,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:24:45,221 INFO L225 Difference]: With dead ends: 25 [2022-11-25 22:24:45,221 INFO L226 Difference]: Without dead ends: 20 [2022-11-25 22:24:45,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:24:45,223 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:24:45,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 12 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:24:45,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-25 22:24:45,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2022-11-25 22:24:45,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:24:45,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-25 22:24:45,232 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 17 [2022-11-25 22:24:45,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:24:45,233 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-25 22:24:45,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 22:24:45,234 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-25 22:24:45,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 22:24:45,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:24:45,235 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:24:45,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:24:45,236 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:24:45,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:24:45,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1407331851, now seen corresponding path program 1 times [2022-11-25 22:24:45,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:24:45,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424810175] [2022-11-25 22:24:45,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:45,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:24:45,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 22:24:45,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:24:45,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424810175] [2022-11-25 22:24:45,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424810175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:24:45,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219526063] [2022-11-25 22:24:45,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:45,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:45,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:24:45,475 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:24:45,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:24:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:45,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:24:45,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:24:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 22:24:45,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:24:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 22:24:45,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219526063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:24:45,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [821580250] [2022-11-25 22:24:45,892 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-25 22:24:45,893 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:24:45,897 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:24:45,903 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:24:45,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:24:46,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:46,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:46,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:46,208 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-25 22:24:46,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-25 22:24:46,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:46,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:46,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:46,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-25 22:24:47,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:47,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:47,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:47,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 22:24:50,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:50,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:50,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:50,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:50,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:50,292 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 22:24:50,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 573 treesize of output 539 [2022-11-25 22:24:54,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:54,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:54,687 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 22:24:54,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 22:24:54,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:54,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:54,953 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 22:24:54,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 22:24:55,055 INFO L321 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-11-25 22:24:55,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 40 [2022-11-25 22:24:55,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:55,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:55,135 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-25 22:24:55,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-25 22:24:55,238 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2022-11-25 22:24:55,240 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:24:55,857 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '262#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-25 22:24:55,858 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:24:55,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:24:55,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-11-25 22:24:55,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524896142] [2022-11-25 22:24:55,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:24:55,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:24:55,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:24:55,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:24:55,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2022-11-25 22:24:55,861 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 22:24:56,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:24:56,071 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2022-11-25 22:24:56,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:24:56,072 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 18 [2022-11-25 22:24:56,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:24:56,074 INFO L225 Difference]: With dead ends: 52 [2022-11-25 22:24:56,074 INFO L226 Difference]: Without dead ends: 45 [2022-11-25 22:24:56,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2022-11-25 22:24:56,076 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:24:56,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 18 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:24:56,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-25 22:24:56,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2022-11-25 22:24:56,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 22:24:56,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 47 transitions. [2022-11-25 22:24:56,096 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 47 transitions. Word has length 18 [2022-11-25 22:24:56,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:24:56,096 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 47 transitions. [2022-11-25 22:24:56,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 22:24:56,097 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 47 transitions. [2022-11-25 22:24:56,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-25 22:24:56,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:24:56,100 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-25 22:24:56,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:24:56,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-25 22:24:56,307 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:24:56,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:24:56,308 INFO L85 PathProgramCache]: Analyzing trace with hash 2143827323, now seen corresponding path program 2 times [2022-11-25 22:24:56,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:24:56,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267256146] [2022-11-25 22:24:56,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:56,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:24:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-25 22:24:56,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:24:56,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267256146] [2022-11-25 22:24:56,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267256146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:24:56,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986813912] [2022-11-25 22:24:56,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:24:56,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:56,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:24:56,570 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:24:56,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:24:56,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 22:24:56,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:24:56,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 22:24:56,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:24:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-11-25 22:24:56,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:24:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-11-25 22:24:57,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986813912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:24:57,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1109050968] [2022-11-25 22:24:57,008 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-25 22:24:57,008 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:24:57,008 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:24:57,009 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:24:57,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:24:57,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:57,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:57,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:57,131 INFO L321 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2022-11-25 22:24:57,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 72 [2022-11-25 22:24:57,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:57,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:57,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:57,293 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-25 22:24:57,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-25 22:24:57,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:57,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:57,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:57,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 22:25:00,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:00,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:00,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:00,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:00,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:00,348 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 22:25:00,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 573 treesize of output 539 [2022-11-25 22:25:03,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:03,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:03,813 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 22:25:03,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 22:25:04,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:04,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:04,078 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 22:25:04,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 22:25:04,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:04,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:04,168 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-25 22:25:04,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-25 22:25:04,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:04,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:04,249 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-25 22:25:04,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-25 22:25:04,373 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2022-11-25 22:25:04,375 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:25:05,086 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '753#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-25 22:25:05,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:25:05,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:25:05,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 19 [2022-11-25 22:25:05,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482197826] [2022-11-25 22:25:05,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:25:05,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 22:25:05,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:05,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 22:25:05,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2022-11-25 22:25:05,089 INFO L87 Difference]: Start difference. First operand 34 states and 47 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-25 22:25:05,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:25:05,503 INFO L93 Difference]: Finished difference Result 121 states and 165 transitions. [2022-11-25 22:25:05,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 22:25:05,504 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 54 [2022-11-25 22:25:05,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:25:05,514 INFO L225 Difference]: With dead ends: 121 [2022-11-25 22:25:05,515 INFO L226 Difference]: Without dead ends: 111 [2022-11-25 22:25:05,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 22:25:05,520 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 189 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:25:05,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 42 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:25:05,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-25 22:25:05,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 70. [2022-11-25 22:25:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-25 22:25:05,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 101 transitions. [2022-11-25 22:25:05,554 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 101 transitions. Word has length 54 [2022-11-25 22:25:05,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:25:05,555 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 101 transitions. [2022-11-25 22:25:05,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-25 22:25:05,555 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 101 transitions. [2022-11-25 22:25:05,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-25 22:25:05,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:05,562 INFO L195 NwaCegarLoop]: trace histogram [30, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-11-25 22:25:05,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 22:25:05,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:05,768 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:25:05,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:05,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1580456123, now seen corresponding path program 3 times [2022-11-25 22:25:05,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:05,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759185501] [2022-11-25 22:25:05,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:05,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2022-11-25 22:25:06,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:06,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759185501] [2022-11-25 22:25:06,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759185501] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:25:06,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346042790] [2022-11-25 22:25:06,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:25:06,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:06,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:25:06,545 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:25:06,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:25:08,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:25:08,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:25:08,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 22:25:08,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:25:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2022-11-25 22:25:09,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:25:09,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2022-11-25 22:25:09,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346042790] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:25:09,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [98148434] [2022-11-25 22:25:09,419 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-25 22:25:09,419 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:25:09,419 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:25:09,420 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:25:09,420 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:25:09,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:09,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:09,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:09,585 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-25 22:25:09,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-25 22:25:09,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:09,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:09,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:09,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-25 22:25:09,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:09,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:09,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:09,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-25 22:25:12,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:12,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:12,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:12,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:12,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:12,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:12,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:12,405 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-25 22:25:12,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 623 treesize of output 537 [2022-11-25 22:25:13,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:13,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:13,585 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 22:25:13,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 22:25:14,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:14,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:14,319 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 22:25:14,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 22:25:14,400 INFO L321 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-11-25 22:25:14,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 40 [2022-11-25 22:25:14,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:14,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:14,489 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-25 22:25:14,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-25 22:25:14,755 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2022-11-25 22:25:14,765 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:25:15,787 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1873#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-25 22:25:15,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:25:15,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:25:15,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2022-11-25 22:25:15,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967250290] [2022-11-25 22:25:15,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:25:15,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 22:25:15,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:15,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 22:25:15,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=1359, Unknown=0, NotChecked=0, Total=2070 [2022-11-25 22:25:15,792 INFO L87 Difference]: Start difference. First operand 70 states and 101 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) [2022-11-25 22:25:16,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:25:16,825 INFO L93 Difference]: Finished difference Result 259 states and 351 transitions. [2022-11-25 22:25:16,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 22:25:16,826 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) Word has length 126 [2022-11-25 22:25:16,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:25:16,829 INFO L225 Difference]: With dead ends: 259 [2022-11-25 22:25:16,829 INFO L226 Difference]: Without dead ends: 243 [2022-11-25 22:25:16,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 334 SyntacticMatches, 11 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1031, Invalid=2161, Unknown=0, NotChecked=0, Total=3192 [2022-11-25 22:25:16,832 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 450 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:25:16,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 84 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 22:25:16,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-25 22:25:16,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 142. [2022-11-25 22:25:16,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-11-25 22:25:16,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 209 transitions. [2022-11-25 22:25:16,865 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 209 transitions. Word has length 126 [2022-11-25 22:25:16,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:25:16,866 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 209 transitions. [2022-11-25 22:25:16,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) [2022-11-25 22:25:16,867 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 209 transitions. [2022-11-25 22:25:16,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-11-25 22:25:16,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:16,873 INFO L195 NwaCegarLoop]: trace histogram [66, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2022-11-25 22:25:16,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:25:17,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:17,084 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:25:17,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:17,084 INFO L85 PathProgramCache]: Analyzing trace with hash 81571643, now seen corresponding path program 4 times [2022-11-25 22:25:17,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:17,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3036863] [2022-11-25 22:25:17,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:17,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:19,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2022-11-25 22:25:19,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:19,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3036863] [2022-11-25 22:25:19,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3036863] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:25:19,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039811056] [2022-11-25 22:25:19,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:25:19,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:19,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:25:19,029 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:25:19,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:25:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:19,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 22:25:19,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:25:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2022-11-25 22:25:20,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:25:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2022-11-25 22:25:21,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039811056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:25:21,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1501285320] [2022-11-25 22:25:21,589 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-25 22:25:21,589 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:25:21,589 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:25:21,589 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:25:21,590 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:25:21,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:21,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:21,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:21,710 INFO L321 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2022-11-25 22:25:21,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 72 [2022-11-25 22:25:21,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:21,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:21,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:21,860 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-25 22:25:21,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-25 22:25:22,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:22,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:22,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:22,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 22:25:24,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:24,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:24,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:24,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:24,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:24,446 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 22:25:24,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 573 treesize of output 539 [2022-11-25 22:25:28,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:28,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:28,294 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 22:25:28,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 22:25:28,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:28,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:29,004 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 22:25:29,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 22:25:29,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:29,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:29,086 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-25 22:25:29,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-25 22:25:29,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:29,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:29,164 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-25 22:25:29,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-25 22:25:29,384 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2022-11-25 22:25:29,394 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:25:31,010 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4253#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-25 22:25:31,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:25:31,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:25:31,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2022-11-25 22:25:31,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265453267] [2022-11-25 22:25:31,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:25:31,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-25 22:25:31,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:31,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-25 22:25:31,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2535, Invalid=4107, Unknown=0, NotChecked=0, Total=6642 [2022-11-25 22:25:31,020 INFO L87 Difference]: Start difference. First operand 142 states and 209 transitions. Second operand has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) [2022-11-25 22:25:33,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:25:33,534 INFO L93 Difference]: Finished difference Result 535 states and 723 transitions. [2022-11-25 22:25:33,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-25 22:25:33,535 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) Word has length 270 [2022-11-25 22:25:33,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:25:33,539 INFO L225 Difference]: With dead ends: 535 [2022-11-25 22:25:33,539 INFO L226 Difference]: Without dead ends: 507 [2022-11-25 22:25:33,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 730 SyntacticMatches, 23 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7352 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3755, Invalid=7165, Unknown=0, NotChecked=0, Total=10920 [2022-11-25 22:25:33,543 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1072 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:25:33,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1075 Valid, 174 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 22:25:33,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-11-25 22:25:33,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 286. [2022-11-25 22:25:33,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 138 states have call successors, (138), 1 states have call predecessors, (138), 1 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2022-11-25 22:25:33,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 425 transitions. [2022-11-25 22:25:33,590 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 425 transitions. Word has length 270 [2022-11-25 22:25:33,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:25:33,592 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 425 transitions. [2022-11-25 22:25:33,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) [2022-11-25 22:25:33,592 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 425 transitions. [2022-11-25 22:25:33,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2022-11-25 22:25:33,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:33,608 INFO L195 NwaCegarLoop]: trace histogram [138, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2022-11-25 22:25:33,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:25:33,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:33,824 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:25:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:33,825 INFO L85 PathProgramCache]: Analyzing trace with hash -117138373, now seen corresponding path program 5 times [2022-11-25 22:25:33,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:33,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690789802] [2022-11-25 22:25:33,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:33,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 19987 trivial. 0 not checked. [2022-11-25 22:25:40,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:40,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690789802] [2022-11-25 22:25:40,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690789802] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:25:40,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717496627] [2022-11-25 22:25:40,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:25:40,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:40,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:25:40,019 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:25:40,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:27:50,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-25 22:27:50,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:27:50,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-25 22:27:50,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 226 proven. 1081 refuted. 0 times theorem prover too weak. 23901 trivial. 0 not checked. [2022-11-25 22:27:53,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:27:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 0 proven. 1352 refuted. 0 times theorem prover too weak. 23856 trivial. 0 not checked. [2022-11-25 22:27:57,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717496627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:27:57,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [838367867] [2022-11-25 22:27:57,510 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-25 22:27:57,510 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:27:57,511 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:27:57,511 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:27:57,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:27:57,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:57,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:57,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:57,644 INFO L321 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2022-11-25 22:27:57,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 72 [2022-11-25 22:27:57,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:57,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:57,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:57,780 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-25 22:27:57,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-25 22:27:58,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:58,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:58,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:58,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 22:28:00,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:00,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:00,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:28:00,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:28:00,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:28:00,272 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 22:28:00,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 573 treesize of output 539 [2022-11-25 22:28:03,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:03,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:28:03,177 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 22:28:03,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 22:28:03,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:03,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:28:03,390 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 22:28:03,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 22:28:03,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:28:03,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:28:03,466 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-25 22:28:03,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-25 22:28:03,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:28:03,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:28:03,528 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-25 22:28:03,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-25 22:28:03,618 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2022-11-25 22:28:03,619 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:28:07,021 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9159#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-25 22:28:07,022 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:28:07,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:28:07,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 51, 53] total 150 [2022-11-25 22:28:07,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606471594] [2022-11-25 22:28:07,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:28:07,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-11-25 22:28:07,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:07,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-11-25 22:28:07,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10283, Invalid=15157, Unknown=0, NotChecked=0, Total=25440 [2022-11-25 22:28:07,053 INFO L87 Difference]: Start difference. First operand 286 states and 425 transitions. Second operand has 150 states, 150 states have (on average 1.3866666666666667) internal successors, (208), 150 states have internal predecessors, (208), 50 states have call successors, (150), 2 states have call predecessors, (150), 2 states have return successors, (150), 50 states have call predecessors, (150), 50 states have call successors, (150) [2022-11-25 22:28:17,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:17,593 INFO L93 Difference]: Finished difference Result 1087 states and 1467 transitions. [2022-11-25 22:28:17,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-25 22:28:17,594 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 1.3866666666666667) internal successors, (208), 150 states have internal predecessors, (208), 50 states have call successors, (150), 2 states have call predecessors, (150), 2 states have return successors, (150), 50 states have call predecessors, (150), 50 states have call successors, (150) Word has length 558 [2022-11-25 22:28:17,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:17,602 INFO L225 Difference]: With dead ends: 1087 [2022-11-25 22:28:17,602 INFO L226 Difference]: Without dead ends: 1035 [2022-11-25 22:28:17,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1767 GetRequests, 1516 SyntacticMatches, 47 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29021 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=15205, Invalid=27025, Unknown=0, NotChecked=0, Total=42230 [2022-11-25 22:28:17,614 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2522 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 2689 mSolverCounterSat, 2298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2660 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 4987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2298 IncrementalHoareTripleChecker+Valid, 2689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:17,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2660 Valid, 375 Invalid, 4987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2298 Valid, 2689 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-25 22:28:17,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-11-25 22:28:17,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 574. [2022-11-25 22:28:17,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 290 states have (on average 1.0103448275862068) internal successors, (293), 290 states have internal predecessors, (293), 282 states have call successors, (282), 1 states have call predecessors, (282), 1 states have return successors, (282), 282 states have call predecessors, (282), 282 states have call successors, (282) [2022-11-25 22:28:17,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 857 transitions. [2022-11-25 22:28:17,698 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 857 transitions. Word has length 558 [2022-11-25 22:28:17,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:17,700 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 857 transitions. [2022-11-25 22:28:17,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 1.3866666666666667) internal successors, (208), 150 states have internal predecessors, (208), 50 states have call successors, (150), 2 states have call predecessors, (150), 2 states have return successors, (150), 50 states have call predecessors, (150), 50 states have call successors, (150) [2022-11-25 22:28:17,701 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 857 transitions. [2022-11-25 22:28:17,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1135 [2022-11-25 22:28:17,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:17,760 INFO L195 NwaCegarLoop]: trace histogram [282, 94, 94, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:17,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:17,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 22:28:17,978 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:17,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:17,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1361933883, now seen corresponding path program 6 times [2022-11-25 22:28:17,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:17,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684540509] [2022-11-25 22:28:17,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:17,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 105656 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 83707 trivial. 0 not checked. [2022-11-25 22:28:37,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:37,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684540509] [2022-11-25 22:28:37,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684540509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:28:37,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816065450] [2022-11-25 22:28:37,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:28:37,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:37,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:37,403 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:37,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2431f03f-459d-4abf-aeb4-376bdf168926/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process