./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0 --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 1be1405ed24182ea691f06aafa4c0ada74bba78ab2a6f90fefc65156bb70df6c --- 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-e04fb08 [2022-11-16 19:27:25,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:27:25,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:27:25,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:27:25,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:27:25,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:27:25,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:27:25,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:27:25,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:27:25,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:27:25,503 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:27:25,504 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:27:25,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:27:25,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:27:25,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:27:25,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:27:25,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:27:25,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:27:25,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:27:25,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:27:25,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:27:25,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:27:25,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:27:25,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:27:25,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:27:25,521 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:27:25,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:27:25,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:27:25,523 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:27:25,524 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:27:25,524 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:27:25,525 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:27:25,526 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:27:25,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:27:25,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:27:25,528 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:27:25,528 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:27:25,529 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:27:25,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:27:25,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:27:25,531 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:27:25,532 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 19:27:25,567 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:27:25,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:27:25,568 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:27:25,568 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:27:25,568 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:27:25,568 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:27:25,569 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:27:25,569 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:27:25,569 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:27:25,569 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:27:25,570 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:27:25,570 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:27:25,570 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:27:25,570 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:27:25,570 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:27:25,571 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:27:25,571 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:27:25,571 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:27:25,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:27:25,572 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:27:25,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:27:25,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:27:25,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:27:25,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:27:25,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:27:25,578 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:27:25,578 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:27:25,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:27:25,579 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:27:25,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:27:25,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:27:25,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:27:25,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:27:25,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:27:25,581 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:27:25,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:27:25,582 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:27:25,582 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:27:25,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:27:25,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:27:25,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:27:25,582 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_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1be1405ed24182ea691f06aafa4c0ada74bba78ab2a6f90fefc65156bb70df6c [2022-11-16 19:27:25,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:27:25,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:27:25,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:27:25,951 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:27:25,952 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:27:25,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-crafted/zero_sum_const2.c [2022-11-16 19:27:26,017 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/data/71d5c72e5/3db87460e9fc4c46938aa9d9e2316462/FLAG2cebc7090 [2022-11-16 19:27:26,528 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:27:26,529 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/sv-benchmarks/c/array-crafted/zero_sum_const2.c [2022-11-16 19:27:26,535 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/data/71d5c72e5/3db87460e9fc4c46938aa9d9e2316462/FLAG2cebc7090 [2022-11-16 19:27:26,902 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/data/71d5c72e5/3db87460e9fc4c46938aa9d9e2316462 [2022-11-16 19:27:26,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:27:26,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:27:26,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:27:26,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:27:26,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:27:26,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:27:26" (1/1) ... [2022-11-16 19:27:26,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@474711de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:26, skipping insertion in model container [2022-11-16 19:27:26,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:27:26" (1/1) ... [2022-11-16 19:27:26,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:27:26,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:27:27,111 WARN L229 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_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/sv-benchmarks/c/array-crafted/zero_sum_const2.c[406,419] [2022-11-16 19:27:27,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:27:27,140 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:27:27,152 WARN L229 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_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/sv-benchmarks/c/array-crafted/zero_sum_const2.c[406,419] [2022-11-16 19:27:27,159 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:27:27,171 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:27:27,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:27 WrapperNode [2022-11-16 19:27:27,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:27:27,173 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:27:27,173 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:27:27,173 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:27:27,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:27" (1/1) ... [2022-11-16 19:27:27,187 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:27" (1/1) ... [2022-11-16 19:27:27,204 INFO L138 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2022-11-16 19:27:27,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:27:27,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:27:27,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:27:27,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:27:27,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:27" (1/1) ... [2022-11-16 19:27:27,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:27" (1/1) ... [2022-11-16 19:27:27,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:27" (1/1) ... [2022-11-16 19:27:27,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:27" (1/1) ... [2022-11-16 19:27:27,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:27" (1/1) ... [2022-11-16 19:27:27,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:27" (1/1) ... [2022-11-16 19:27:27,227 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:27" (1/1) ... [2022-11-16 19:27:27,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:27" (1/1) ... [2022-11-16 19:27:27,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:27:27,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:27:27,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:27:27,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:27:27,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:27" (1/1) ... [2022-11-16 19:27:27,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:27:27,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:27:27,267 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:27:27,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:27:27,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:27:27,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:27:27,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 19:27:27,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 19:27:27,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:27:27,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:27:27,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 19:27:27,390 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:27:27,392 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:27:27,576 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:27:27,642 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:27:27,643 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-16 19:27:27,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:27:27 BoogieIcfgContainer [2022-11-16 19:27:27,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:27:27,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:27:27,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:27:27,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:27:27,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:27:26" (1/3) ... [2022-11-16 19:27:27,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773916bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:27:27, skipping insertion in model container [2022-11-16 19:27:27,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:27" (2/3) ... [2022-11-16 19:27:27,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773916bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:27:27, skipping insertion in model container [2022-11-16 19:27:27,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:27:27" (3/3) ... [2022-11-16 19:27:27,673 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const2.c [2022-11-16 19:27:27,697 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:27:27,698 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 19:27:27,762 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:27:27,772 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;@3f80e551, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:27:27,772 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 19:27:27,776 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:27,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 19:27:27,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:27,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:27,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:27:27,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:27,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1853536887, now seen corresponding path program 1 times [2022-11-16 19:27:27,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:27,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512918011] [2022-11-16 19:27:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:27,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:27:28,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:28,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512918011] [2022-11-16 19:27:28,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512918011] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:27:28,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:27:28,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:27:28,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521352085] [2022-11-16 19:27:28,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:27:28,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:27:28,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:28,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:27:28,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:27:28,129 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:28,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:28,206 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2022-11-16 19:27:28,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:27:28,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 19:27:28,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:28,216 INFO L225 Difference]: With dead ends: 24 [2022-11-16 19:27:28,216 INFO L226 Difference]: Without dead ends: 11 [2022-11-16 19:27:28,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:27:28,223 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:28,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:27:28,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-16 19:27:28,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-16 19:27:28,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2022-11-16 19:27:28,254 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 9 [2022-11-16 19:27:28,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:28,255 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2022-11-16 19:27:28,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:28,255 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2022-11-16 19:27:28,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:27:28,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:28,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:28,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:27:28,256 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:27:28,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:28,257 INFO L85 PathProgramCache]: Analyzing trace with hash -288493454, now seen corresponding path program 1 times [2022-11-16 19:27:28,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:28,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307649854] [2022-11-16 19:27:28,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:28,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:27:28,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:28,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307649854] [2022-11-16 19:27:28,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307649854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:27:28,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:27:28,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:27:28,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58306291] [2022-11-16 19:27:28,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:27:28,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:27:28,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:28,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:27:28,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:27:28,392 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:28,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:28,430 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2022-11-16 19:27:28,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:27:28,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 19:27:28,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:28,431 INFO L225 Difference]: With dead ends: 21 [2022-11-16 19:27:28,431 INFO L226 Difference]: Without dead ends: 15 [2022-11-16 19:27:28,432 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 [2022-11-16 19:27:28,433 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:28,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 5 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:27:28,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-16 19:27:28,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-16 19:27:28,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:28,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-11-16 19:27:28,443 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 10 [2022-11-16 19:27:28,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:28,444 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-11-16 19:27:28,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:28,444 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-11-16 19:27:28,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 19:27:28,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:28,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:28,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 19:27:28,445 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:27:28,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:28,446 INFO L85 PathProgramCache]: Analyzing trace with hash -918811174, now seen corresponding path program 1 times [2022-11-16 19:27:28,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:28,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507405982] [2022-11-16 19:27:28,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:28,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 19:27:28,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:28,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507405982] [2022-11-16 19:27:28,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507405982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:27:28,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881528521] [2022-11-16 19:27:28,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:28,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:27:28,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:27:28,616 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:27:28,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:27:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:28,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 19:27:28,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:27:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 19:27:28,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:27:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 19:27:28,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881528521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:27:28,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1406293299] [2022-11-16 19:27:28,898 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:27:28,899 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:27:28,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:27:28,909 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:27:28,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:27:29,130 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:27:29,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:27:29,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:27:29,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:27:29,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:27:29,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:27:29,425 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:27:29,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:27:29,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:27:29,839 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:27:30,203 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '220#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:27:30,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:27:30,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:27:30,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-16 19:27:30,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473800479] [2022-11-16 19:27:30,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:27:30,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:27:30,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:30,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:27:30,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-16 19:27:30,212 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:30,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:30,263 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-11-16 19:27:30,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:27:30,264 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 19:27:30,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:30,265 INFO L225 Difference]: With dead ends: 27 [2022-11-16 19:27:30,265 INFO L226 Difference]: Without dead ends: 16 [2022-11-16 19:27:30,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-16 19:27:30,270 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:30,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:27:30,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-16 19:27:30,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-16 19:27:30,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 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) [2022-11-16 19:27:30,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-16 19:27:30,289 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 14 [2022-11-16 19:27:30,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:30,290 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-16 19:27:30,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:30,291 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-16 19:27:30,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 19:27:30,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:30,292 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:30,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 19:27:30,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:27:30,497 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:27:30,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:30,498 INFO L85 PathProgramCache]: Analyzing trace with hash 510053521, now seen corresponding path program 2 times [2022-11-16 19:27:30,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:30,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484114433] [2022-11-16 19:27:30,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:30,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 19:27:30,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:30,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484114433] [2022-11-16 19:27:30,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484114433] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:27:30,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683539455] [2022-11-16 19:27:30,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:27:30,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:27:30,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:27:30,590 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:27:30,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 19:27:30,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:27:30,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:27:30,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 19:27:30,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:27:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 19:27:30,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:27:30,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 19:27:30,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683539455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:27:30,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1032748317] [2022-11-16 19:27:30,740 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:27:30,741 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:27:30,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:27:30,741 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:27:30,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:27:30,818 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:27:30,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:27:30,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:27:30,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:27:30,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:27:30,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:27:31,008 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:27:31,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:27:31,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:27:31,264 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:27:31,476 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '390#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:27:31,476 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:27:31,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:27:31,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-16 19:27:31,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026711520] [2022-11-16 19:27:31,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:27:31,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 19:27:31,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:31,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 19:27:31,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-16 19:27:31,479 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:31,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:31,540 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-11-16 19:27:31,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:27:31,541 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 19:27:31,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:31,542 INFO L225 Difference]: With dead ends: 29 [2022-11-16 19:27:31,542 INFO L226 Difference]: Without dead ends: 20 [2022-11-16 19:27:31,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-16 19:27:31,543 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:31,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 7 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:27:31,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-16 19:27:31,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-16 19:27:31,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-11-16 19:27:31,553 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 15 [2022-11-16 19:27:31,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:31,554 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-11-16 19:27:31,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:31,555 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-11-16 19:27:31,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 19:27:31,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:31,556 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:31,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 19:27:31,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:27:31,762 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:27:31,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:31,763 INFO L85 PathProgramCache]: Analyzing trace with hash -869134615, now seen corresponding path program 3 times [2022-11-16 19:27:31,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:31,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201281633] [2022-11-16 19:27:31,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:31,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:27:33,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:33,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201281633] [2022-11-16 19:27:33,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201281633] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:27:33,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727170324] [2022-11-16 19:27:33,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:27:33,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:27:33,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:27:33,253 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:27:33,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 19:27:33,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:27:33,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:27:33,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-16 19:27:33,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:27:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:27:33,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:27:33,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:27:33,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2022-11-16 19:27:34,041 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2022-11-16 19:27:34,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2022-11-16 19:27:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:27:34,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727170324] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:27:34,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1708120334] [2022-11-16 19:27:34,095 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:27:34,096 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:27:34,096 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:27:34,096 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:27:34,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:27:34,169 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-16 19:27:34,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-16 19:27:34,235 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:27:34,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:27:34,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:27:34,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:27:34,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:27:34,371 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:27:34,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:27:34,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:27:34,574 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:27:34,880 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '613#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:27:34,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:27:34,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:27:34,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 25 [2022-11-16 19:27:34,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419896264] [2022-11-16 19:27:34,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:27:34,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 19:27:34,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:34,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 19:27:34,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-11-16 19:27:34,882 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 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) [2022-11-16 19:27:35,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:35,203 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2022-11-16 19:27:35,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 19:27:35,204 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 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 19 [2022-11-16 19:27:35,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:35,205 INFO L225 Difference]: With dead ends: 33 [2022-11-16 19:27:35,205 INFO L226 Difference]: Without dead ends: 30 [2022-11-16 19:27:35,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 19:27:35,206 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:35,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:27:35,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-16 19:27:35,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-11-16 19:27:35,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 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) [2022-11-16 19:27:35,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-11-16 19:27:35,214 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 19 [2022-11-16 19:27:35,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:35,214 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-11-16 19:27:35,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 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) [2022-11-16 19:27:35,214 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-11-16 19:27:35,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:27:35,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:35,215 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:35,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 19:27:35,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:27:35,416 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:27:35,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:35,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1056486243, now seen corresponding path program 4 times [2022-11-16 19:27:35,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:35,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141044747] [2022-11-16 19:27:35,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:35,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 19:27:35,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:35,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141044747] [2022-11-16 19:27:35,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141044747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:27:35,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344202011] [2022-11-16 19:27:35,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:27:35,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:27:35,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:27:35,514 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:27:35,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 19:27:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:35,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 19:27:35,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:27:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 19:27:35,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:27:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 19:27:35,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344202011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:27:35,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [675781043] [2022-11-16 19:27:35,723 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:27:35,723 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:27:35,724 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:27:35,724 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:27:35,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:27:35,790 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-16 19:27:35,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-16 19:27:35,856 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:27:35,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:27:35,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:27:35,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:27:35,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:27:35,966 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:27:35,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:27:36,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:27:36,133 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:27:36,364 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '860#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:27:36,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:27:36,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:27:36,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-11-16 19:27:36,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643125062] [2022-11-16 19:27:36,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:27:36,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 19:27:36,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:36,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 19:27:36,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-16 19:27:36,367 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:36,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:36,537 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-11-16 19:27:36,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 19:27:36,539 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 19:27:36,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:36,539 INFO L225 Difference]: With dead ends: 62 [2022-11-16 19:27:36,539 INFO L226 Difference]: Without dead ends: 37 [2022-11-16 19:27:36,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-11-16 19:27:36,541 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:36,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 9 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:27:36,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-16 19:27:36,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-11-16 19:27:36,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:36,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-11-16 19:27:36,550 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 20 [2022-11-16 19:27:36,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:36,550 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-11-16 19:27:36,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:36,550 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-11-16 19:27:36,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 19:27:36,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:36,551 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:36,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 19:27:36,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 19:27:36,757 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:27:36,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:36,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1086331372, now seen corresponding path program 5 times [2022-11-16 19:27:36,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:36,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021684612] [2022-11-16 19:27:36,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:36,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 19:27:36,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:36,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021684612] [2022-11-16 19:27:36,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021684612] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:27:36,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893833385] [2022-11-16 19:27:36,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:27:36,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:27:36,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:27:36,876 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:27:36,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 19:27:36,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 19:27:36,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:27:36,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 19:27:36,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:27:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 19:27:37,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:27:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 19:27:37,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893833385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:27:37,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [827093982] [2022-11-16 19:27:37,105 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:27:37,105 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:27:37,105 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:27:37,105 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:27:37,106 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:27:37,162 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-16 19:27:37,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-16 19:27:37,223 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:27:37,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:27:37,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:27:37,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:27:37,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:27:37,339 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-16 19:27:37,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-11-16 19:27:37,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:27:37,570 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:27:37,955 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1170#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:27:37,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:27:37,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:27:37,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-16 19:27:37,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791915390] [2022-11-16 19:27:37,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:27:37,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 19:27:37,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:37,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 19:27:37,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-16 19:27:37,957 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:38,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:38,110 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-11-16 19:27:38,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 19:27:38,111 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 19:27:38,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:38,111 INFO L225 Difference]: With dead ends: 34 [2022-11-16 19:27:38,112 INFO L226 Difference]: Without dead ends: 25 [2022-11-16 19:27:38,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 15 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-11-16 19:27:38,113 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:38,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 7 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:27:38,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-16 19:27:38,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-16 19:27:38,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 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) [2022-11-16 19:27:38,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-16 19:27:38,118 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 21 [2022-11-16 19:27:38,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:38,119 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-16 19:27:38,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:38,119 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-16 19:27:38,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 19:27:38,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:38,120 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:38,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-16 19:27:38,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:27:38,325 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:27:38,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:38,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1278953466, now seen corresponding path program 6 times [2022-11-16 19:27:38,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:38,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459762752] [2022-11-16 19:27:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:38,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:27:40,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:40,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459762752] [2022-11-16 19:27:40,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459762752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:27:40,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905776134] [2022-11-16 19:27:40,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:27:40,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:27:40,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:27:40,557 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:27:40,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 19:27:40,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:27:40,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:27:40,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-16 19:27:40,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:27:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:27:41,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:27:42,153 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:27:42,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 108 [2022-11-16 19:27:42,427 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-11-16 19:27:42,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 23 [2022-11-16 19:27:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:27:42,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905776134] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:27:42,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [267117543] [2022-11-16 19:27:42,603 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:27:42,603 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:27:42,603 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:27:42,604 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:27:42,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:27:42,665 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:27:42,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:27:42,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:27:42,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:27:42,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:27:42,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:27:42,778 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-16 19:27:42,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-11-16 19:27:42,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:27:42,963 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:27:43,414 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1473#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:27:43,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:27:43,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:27:43,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14, 16] total 45 [2022-11-16 19:27:43,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093752982] [2022-11-16 19:27:43,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:27:43,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-16 19:27:43,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:43,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-16 19:27:43,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2254, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 19:27:43,417 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 45 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 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) [2022-11-16 19:27:46,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:46,077 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2022-11-16 19:27:46,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 19:27:46,082 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 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 24 [2022-11-16 19:27:46,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:46,083 INFO L225 Difference]: With dead ends: 47 [2022-11-16 19:27:46,083 INFO L226 Difference]: Without dead ends: 44 [2022-11-16 19:27:46,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=432, Invalid=4260, Unknown=0, NotChecked=0, Total=4692 [2022-11-16 19:27:46,085 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:46,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 82 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 19:27:46,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-16 19:27:46,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2022-11-16 19:27:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:46,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-11-16 19:27:46,097 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 24 [2022-11-16 19:27:46,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:46,097 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-11-16 19:27:46,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 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) [2022-11-16 19:27:46,098 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-11-16 19:27:46,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 19:27:46,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:46,099 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:46,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 19:27:46,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:27:46,304 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:27:46,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:46,305 INFO L85 PathProgramCache]: Analyzing trace with hash -866602372, now seen corresponding path program 7 times [2022-11-16 19:27:46,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:46,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634075246] [2022-11-16 19:27:46,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:46,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 19:27:46,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:46,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634075246] [2022-11-16 19:27:46,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634075246] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:27:46,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175404879] [2022-11-16 19:27:46,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:27:46,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:27:46,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:27:46,442 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:27:46,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 19:27:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:46,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 19:27:46,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:27:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 19:27:46,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:27:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 19:27:46,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175404879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:27:46,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [806592609] [2022-11-16 19:27:46,668 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:27:46,669 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:27:46,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:27:46,669 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:27:46,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:27:46,733 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-16 19:27:46,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-16 19:27:46,788 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:27:46,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:27:46,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:27:46,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:27:46,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:27:46,923 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-16 19:27:46,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-11-16 19:27:46,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:27:47,121 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:27:47,530 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1824#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:27:47,530 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:27:47,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:27:47,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-11-16 19:27:47,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343021526] [2022-11-16 19:27:47,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:27:47,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 19:27:47,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:47,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 19:27:47,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-11-16 19:27:47,531 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 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) [2022-11-16 19:27:47,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:47,748 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2022-11-16 19:27:47,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 19:27:47,750 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 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 25 [2022-11-16 19:27:47,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:47,750 INFO L225 Difference]: With dead ends: 76 [2022-11-16 19:27:47,751 INFO L226 Difference]: Without dead ends: 44 [2022-11-16 19:27:47,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 45 SyntacticMatches, 19 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2022-11-16 19:27:47,752 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 36 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:47,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 13 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:27:47,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-16 19:27:47,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-11-16 19:27:47,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:47,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-11-16 19:27:47,763 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2022-11-16 19:27:47,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:47,764 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-11-16 19:27:47,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 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) [2022-11-16 19:27:47,764 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-11-16 19:27:47,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 19:27:47,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:47,765 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:47,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 19:27:47,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:27:47,983 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:27:47,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:47,983 INFO L85 PathProgramCache]: Analyzing trace with hash -777491611, now seen corresponding path program 8 times [2022-11-16 19:27:47,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:47,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097060940] [2022-11-16 19:27:47,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:47,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 19:27:48,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:48,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097060940] [2022-11-16 19:27:48,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097060940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:27:48,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841472526] [2022-11-16 19:27:48,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:27:48,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:27:48,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:27:48,127 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:27:48,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 19:27:48,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 19:27:48,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:27:48,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 19:27:48,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:27:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 19:27:48,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:27:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 19:27:48,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841472526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:27:48,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1476070918] [2022-11-16 19:27:48,400 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:27:48,400 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:27:48,400 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:27:48,401 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:27:48,401 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:27:48,454 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-16 19:27:48,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-16 19:27:48,502 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:27:48,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:27:48,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:27:48,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:27:48,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:27:48,594 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:27:48,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:27:48,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:27:48,744 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:27:49,115 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2211#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:27:49,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:27:49,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:27:49,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-16 19:27:49,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274449594] [2022-11-16 19:27:49,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:27:49,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 19:27:49,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:49,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 19:27:49,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-11-16 19:27:49,118 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:49,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:49,301 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-11-16 19:27:49,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 19:27:49,303 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-16 19:27:49,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:49,304 INFO L225 Difference]: With dead ends: 41 [2022-11-16 19:27:49,304 INFO L226 Difference]: Without dead ends: 30 [2022-11-16 19:27:49,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 20 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2022-11-16 19:27:49,305 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:49,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 9 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:27:49,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-16 19:27:49,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-16 19:27:49,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 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) [2022-11-16 19:27:49,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-11-16 19:27:49,315 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 26 [2022-11-16 19:27:49,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:49,315 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-11-16 19:27:49,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:27:49,316 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-11-16 19:27:49,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 19:27:49,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:49,317 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:49,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 19:27:49,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:27:49,522 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:27:49,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:49,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1967427511, now seen corresponding path program 9 times [2022-11-16 19:27:49,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:49,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785034941] [2022-11-16 19:27:49,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:49,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:27:52,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:52,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785034941] [2022-11-16 19:27:52,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785034941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:27:52,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157557583] [2022-11-16 19:27:52,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:27:52,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:27:52,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:27:52,226 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:27:52,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 19:27:52,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:27:52,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:27:52,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-16 19:27:52,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:27:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 19:27:53,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:27:54,507 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:27:54,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 69 treesize of output 185 [2022-11-16 19:27:55,023 INFO L321 Elim1Store]: treesize reduction 156, result has 9.8 percent of original size [2022-11-16 19:27:55,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 70 treesize of output 30 [2022-11-16 19:27:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:27:55,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157557583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:27:55,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [285782834] [2022-11-16 19:27:55,279 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:27:55,279 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:27:55,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:27:55,279 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:27:55,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:27:55,334 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:27:55,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:27:55,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:27:55,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:27:55,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:27:55,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:27:55,447 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:27:55,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:27:55,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:27:55,596 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:27:56,991 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2581#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:27:56,991 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:27:56,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:27:56,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 20] total 56 [2022-11-16 19:27:56,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019339690] [2022-11-16 19:27:56,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:27:56,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-16 19:27:56,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:56,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-16 19:27:56,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=3353, Unknown=0, NotChecked=0, Total=3660 [2022-11-16 19:27:56,994 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 56 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 56 states have internal predecessors, (78), 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) [2022-11-16 19:28:01,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:01,574 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2022-11-16 19:28:01,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 19:28:01,578 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 56 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-16 19:28:01,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:01,579 INFO L225 Difference]: With dead ends: 72 [2022-11-16 19:28:01,579 INFO L226 Difference]: Without dead ends: 68 [2022-11-16 19:28:01,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 32 SyntacticMatches, 22 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2722 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=797, Invalid=7575, Unknown=0, NotChecked=0, Total=8372 [2022-11-16 19:28:01,582 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 26 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:01,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 121 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 19:28:01,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-16 19:28:01,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 44. [2022-11-16 19:28:01,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 43 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:28:01,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2022-11-16 19:28:01,600 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 29 [2022-11-16 19:28:01,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:01,600 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2022-11-16 19:28:01,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 56 states have internal predecessors, (78), 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) [2022-11-16 19:28:01,601 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2022-11-16 19:28:01,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 19:28:01,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:01,602 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:01,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 19:28:01,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:01,808 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:01,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:01,808 INFO L85 PathProgramCache]: Analyzing trace with hash 271791705, now seen corresponding path program 10 times [2022-11-16 19:28:01,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:01,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657770820] [2022-11-16 19:28:01,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:01,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 19:28:01,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:01,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657770820] [2022-11-16 19:28:01,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657770820] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:28:01,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913179767] [2022-11-16 19:28:01,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:28:01,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:01,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:28:01,984 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:28:02,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 19:28:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:02,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 19:28:02,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:28:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 19:28:02,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:28:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 19:28:02,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913179767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:28:02,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1233841498] [2022-11-16 19:28:02,300 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:28:02,300 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:28:02,300 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:28:02,300 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:28:02,300 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:28:02,360 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:28:02,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:28:02,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:28:02,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:28:02,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:28:02,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:28:02,469 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:28:02,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:28:02,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:28:02,609 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:28:03,126 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3057#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:28:03,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:28:03,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:28:03,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-16 19:28:03,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664533221] [2022-11-16 19:28:03,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:28:03,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 19:28:03,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:03,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 19:28:03,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-11-16 19:28:03,128 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:28:03,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:03,403 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2022-11-16 19:28:03,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 19:28:03,404 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-16 19:28:03,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:03,405 INFO L225 Difference]: With dead ends: 109 [2022-11-16 19:28:03,405 INFO L226 Difference]: Without dead ends: 57 [2022-11-16 19:28:03,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 26 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-11-16 19:28:03,406 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:03,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 15 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:28:03,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-16 19:28:03,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2022-11-16 19:28:03,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 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) [2022-11-16 19:28:03,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-11-16 19:28:03,428 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 30 [2022-11-16 19:28:03,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:03,428 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-11-16 19:28:03,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:28:03,428 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-11-16 19:28:03,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 19:28:03,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:03,429 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:03,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 19:28:03,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 19:28:03,635 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:03,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:03,635 INFO L85 PathProgramCache]: Analyzing trace with hash -302676750, now seen corresponding path program 11 times [2022-11-16 19:28:03,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:03,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111331877] [2022-11-16 19:28:03,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:03,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:03,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-16 19:28:03,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:03,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111331877] [2022-11-16 19:28:03,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111331877] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:28:03,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867267186] [2022-11-16 19:28:03,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:28:03,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:03,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:28:03,808 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:28:03,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 19:28:03,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 19:28:03,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:28:03,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 19:28:03,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:28:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-16 19:28:04,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:28:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-16 19:28:04,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867267186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:28:04,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2029704148] [2022-11-16 19:28:04,122 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:28:04,122 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:28:04,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:28:04,122 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:28:04,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:28:04,174 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-16 19:28:04,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-16 19:28:04,228 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:28:04,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:28:04,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:28:04,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:28:04,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:28:04,319 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:28:04,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:28:04,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:28:04,470 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:28:04,957 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3577#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:28:04,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:28:04,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:28:04,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-16 19:28:04,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386165362] [2022-11-16 19:28:04,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:28:04,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 19:28:04,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:04,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 19:28:04,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-11-16 19:28:04,959 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:28:05,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:05,215 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2022-11-16 19:28:05,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 19:28:05,216 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-16 19:28:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:05,216 INFO L225 Difference]: With dead ends: 54 [2022-11-16 19:28:05,216 INFO L226 Difference]: Without dead ends: 41 [2022-11-16 19:28:05,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 59 SyntacticMatches, 25 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2022-11-16 19:28:05,218 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 19 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:05,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 13 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:28:05,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-16 19:28:05,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2022-11-16 19:28:05,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:28:05,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-11-16 19:28:05,237 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 32 [2022-11-16 19:28:05,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:05,237 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-11-16 19:28:05,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:28:05,237 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-11-16 19:28:05,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 19:28:05,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:05,238 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:05,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-16 19:28:05,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:05,444 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:05,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:05,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1803528730, now seen corresponding path program 12 times [2022-11-16 19:28:05,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:05,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881505606] [2022-11-16 19:28:05,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:05,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:10,247 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 3 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:10,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:10,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881505606] [2022-11-16 19:28:10,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881505606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:28:10,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785475846] [2022-11-16 19:28:10,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:28:10,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:10,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:28:10,248 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:28:10,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 19:28:10,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:28:10,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:28:10,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-16 19:28:10,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:28:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 19:28:11,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:28:12,995 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:28:12,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 86 treesize of output 285 [2022-11-16 19:28:14,499 INFO L321 Elim1Store]: treesize reduction 250, result has 7.7 percent of original size [2022-11-16 19:28:14,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 87 treesize of output 36 [2022-11-16 19:28:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 19:28:14,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785475846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:28:14,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1329392552] [2022-11-16 19:28:14,573 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:28:14,573 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:28:14,574 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:28:14,574 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:28:14,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:28:14,631 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:28:14,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:28:14,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:28:14,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:28:14,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:28:14,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:28:14,735 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-16 19:28:14,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-11-16 19:28:14,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:28:14,890 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:28:16,546 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4016#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:28:16,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:28:16,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:28:16,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 16, 16] total 57 [2022-11-16 19:28:16,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427051130] [2022-11-16 19:28:16,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:28:16,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-16 19:28:16,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:16,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-16 19:28:16,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3556, Unknown=0, NotChecked=0, Total=3782 [2022-11-16 19:28:16,549 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 57 states, 57 states have (on average 1.543859649122807) internal successors, (88), 57 states have internal predecessors, (88), 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) [2022-11-16 19:28:21,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:21,097 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2022-11-16 19:28:21,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 19:28:21,098 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.543859649122807) internal successors, (88), 57 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-16 19:28:21,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:21,098 INFO L225 Difference]: With dead ends: 63 [2022-11-16 19:28:21,099 INFO L226 Difference]: Without dead ends: 60 [2022-11-16 19:28:21,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 50 SyntacticMatches, 23 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3130 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=587, Invalid=7785, Unknown=0, NotChecked=0, Total=8372 [2022-11-16 19:28:21,102 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:21,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 145 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1297 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 19:28:21,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-16 19:28:21,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2022-11-16 19:28:21,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 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) [2022-11-16 19:28:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-11-16 19:28:21,121 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 34 [2022-11-16 19:28:21,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:21,122 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-11-16 19:28:21,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.543859649122807) internal successors, (88), 57 states have internal predecessors, (88), 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) [2022-11-16 19:28:21,122 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-11-16 19:28:21,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 19:28:21,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:21,123 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:21,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 19:28:21,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 19:28:21,328 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:21,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:21,328 INFO L85 PathProgramCache]: Analyzing trace with hash 721916124, now seen corresponding path program 13 times [2022-11-16 19:28:21,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:21,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160730622] [2022-11-16 19:28:21,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:21,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 19:28:21,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:21,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160730622] [2022-11-16 19:28:21,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160730622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:28:21,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761292126] [2022-11-16 19:28:21,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:28:21,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:21,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:28:21,518 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:28:21,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 19:28:21,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:21,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:28:21,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:28:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 19:28:21,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:28:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 19:28:21,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761292126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:28:21,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1737279684] [2022-11-16 19:28:21,836 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:28:21,836 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:28:21,836 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:28:21,836 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:28:21,836 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:28:21,892 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:28:21,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:28:21,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:28:21,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:28:21,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:28:21,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:28:21,987 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:28:21,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:28:22,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:28:22,143 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:28:22,761 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4515#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:28:22,762 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:28:22,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:28:22,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2022-11-16 19:28:22,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357529540] [2022-11-16 19:28:22,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:28:22,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 19:28:22,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:22,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 19:28:22,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2022-11-16 19:28:22,763 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 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) [2022-11-16 19:28:23,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:23,064 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2022-11-16 19:28:23,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 19:28:23,064 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-16 19:28:23,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:23,065 INFO L225 Difference]: With dead ends: 104 [2022-11-16 19:28:23,065 INFO L226 Difference]: Without dead ends: 58 [2022-11-16 19:28:23,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 63 SyntacticMatches, 29 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 19:28:23,066 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:23,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 13 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:28:23,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-16 19:28:23,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2022-11-16 19:28:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.14) internal successors, (57), 50 states have internal predecessors, (57), 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) [2022-11-16 19:28:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-11-16 19:28:23,091 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 35 [2022-11-16 19:28:23,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:23,091 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-11-16 19:28:23,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 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) [2022-11-16 19:28:23,091 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-11-16 19:28:23,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 19:28:23,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:23,092 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:23,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 19:28:23,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 19:28:23,297 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:23,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:23,297 INFO L85 PathProgramCache]: Analyzing trace with hash -29885819, now seen corresponding path program 14 times [2022-11-16 19:28:23,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:23,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122997689] [2022-11-16 19:28:23,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:23,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-16 19:28:23,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:23,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122997689] [2022-11-16 19:28:23,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122997689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:28:23,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126583335] [2022-11-16 19:28:23,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:28:23,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:23,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:28:23,516 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:28:23,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 19:28:23,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 19:28:23,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:28:23,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:28:23,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:28:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-16 19:28:23,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:28:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-16 19:28:23,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126583335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:28:23,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [800421370] [2022-11-16 19:28:23,881 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:28:23,881 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:28:23,881 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:28:23,881 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:28:23,881 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:28:23,942 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:28:23,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:28:23,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:28:23,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:28:24,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:28:24,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:28:24,043 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-16 19:28:24,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-11-16 19:28:24,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:28:24,182 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:28:24,718 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5056#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:28:24,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:28:24,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:28:24,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-11-16 19:28:24,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133891187] [2022-11-16 19:28:24,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:28:24,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 19:28:24,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:24,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 19:28:24,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2022-11-16 19:28:24,721 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 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) [2022-11-16 19:28:24,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:24,979 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-11-16 19:28:24,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 19:28:24,980 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 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 36 [2022-11-16 19:28:24,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:24,980 INFO L225 Difference]: With dead ends: 55 [2022-11-16 19:28:24,980 INFO L226 Difference]: Without dead ends: 40 [2022-11-16 19:28:24,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 65 SyntacticMatches, 30 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=243, Invalid=1017, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 19:28:24,982 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:24,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 17 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:28:24,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-16 19:28:25,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-16 19:28:25,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 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) [2022-11-16 19:28:25,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-11-16 19:28:25,003 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 36 [2022-11-16 19:28:25,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:25,003 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-11-16 19:28:25,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 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) [2022-11-16 19:28:25,004 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-11-16 19:28:25,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 19:28:25,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:25,004 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:25,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 19:28:25,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 19:28:25,210 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:25,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:25,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1991993769, now seen corresponding path program 15 times [2022-11-16 19:28:25,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:25,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844164941] [2022-11-16 19:28:25,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:25,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 3 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:30,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:30,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844164941] [2022-11-16 19:28:30,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844164941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:28:30,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754554092] [2022-11-16 19:28:30,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:28:30,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:30,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:28:30,342 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:28:30,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 19:28:30,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:28:30,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:28:30,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-16 19:28:30,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:28:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 19:28:32,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:28:34,804 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:28:34,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 104 treesize of output 408 [2022-11-16 19:28:38,622 INFO L321 Elim1Store]: treesize reduction 366, result has 6.4 percent of original size [2022-11-16 19:28:38,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 103 treesize of output 41 [2022-11-16 19:28:38,862 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 19:28:38,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754554092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:28:38,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [963648488] [2022-11-16 19:28:38,864 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:28:38,864 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:28:38,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:28:38,864 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:28:38,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:28:38,921 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:28:38,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:28:38,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:28:38,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:28:38,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:28:38,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:28:39,020 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-16 19:28:39,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-11-16 19:28:39,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:28:39,201 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:28:41,798 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5557#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:28:41,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:28:41,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:28:41,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 20, 25] total 75 [2022-11-16 19:28:41,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240874022] [2022-11-16 19:28:41,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:28:41,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-16 19:28:41,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:41,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-16 19:28:41,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=5957, Unknown=0, NotChecked=0, Total=6320 [2022-11-16 19:28:41,802 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 75 states, 75 states have (on average 1.3733333333333333) internal successors, (103), 75 states have internal predecessors, (103), 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) [2022-11-16 19:28:49,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:49,208 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2022-11-16 19:28:49,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-16 19:28:49,208 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.3733333333333333) internal successors, (103), 75 states have internal predecessors, (103), 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 39 [2022-11-16 19:28:49,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:49,209 INFO L225 Difference]: With dead ends: 71 [2022-11-16 19:28:49,209 INFO L226 Difference]: Without dead ends: 68 [2022-11-16 19:28:49,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 48 SyntacticMatches, 27 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4000 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=866, Invalid=11344, Unknown=0, NotChecked=0, Total=12210 [2022-11-16 19:28:49,214 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 1688 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:49,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 133 Invalid, 1875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1688 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-16 19:28:49,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-16 19:28:49,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2022-11-16 19:28:49,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:28:49,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2022-11-16 19:28:49,243 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 39 [2022-11-16 19:28:49,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:49,243 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2022-11-16 19:28:49,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.3733333333333333) internal successors, (103), 75 states have internal predecessors, (103), 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) [2022-11-16 19:28:49,244 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2022-11-16 19:28:49,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-16 19:28:49,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:49,244 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:49,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 19:28:49,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 19:28:49,450 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:49,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:49,450 INFO L85 PathProgramCache]: Analyzing trace with hash 198689501, now seen corresponding path program 16 times [2022-11-16 19:28:49,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:49,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926018493] [2022-11-16 19:28:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:49,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-16 19:28:49,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:49,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926018493] [2022-11-16 19:28:49,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926018493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:28:49,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563262848] [2022-11-16 19:28:49,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:28:49,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:49,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:28:49,685 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:28:49,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 19:28:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:49,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:28:49,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:28:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-16 19:28:49,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:28:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-16 19:28:50,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563262848] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:28:50,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1866107049] [2022-11-16 19:28:50,044 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:28:50,044 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:28:50,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:28:50,044 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:28:50,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:28:50,100 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:28:50,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:28:50,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:28:50,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:28:50,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:28:50,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:28:50,197 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:28:50,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:28:50,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:28:50,328 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:28:50,988 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6121#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:28:50,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:28:50,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:28:50,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 25 [2022-11-16 19:28:50,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168110419] [2022-11-16 19:28:50,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:28:50,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 19:28:50,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:50,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 19:28:50,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2022-11-16 19:28:50,990 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:28:51,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:51,316 INFO L93 Difference]: Finished difference Result 118 states and 133 transitions. [2022-11-16 19:28:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 19:28:51,317 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-16 19:28:51,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:51,317 INFO L225 Difference]: With dead ends: 118 [2022-11-16 19:28:51,317 INFO L226 Difference]: Without dead ends: 65 [2022-11-16 19:28:51,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 72 SyntacticMatches, 34 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=281, Invalid=1051, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 19:28:51,318 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 36 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:51,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 13 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:28:51,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-16 19:28:51,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2022-11-16 19:28:51,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 57 states have internal predecessors, (64), 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) [2022-11-16 19:28:51,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2022-11-16 19:28:51,348 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 40 [2022-11-16 19:28:51,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:51,348 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2022-11-16 19:28:51,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:28:51,349 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2022-11-16 19:28:51,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 19:28:51,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:51,349 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:51,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 19:28:51,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 19:28:51,555 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:51,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:51,555 INFO L85 PathProgramCache]: Analyzing trace with hash 65272532, now seen corresponding path program 17 times [2022-11-16 19:28:51,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:51,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451394218] [2022-11-16 19:28:51,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:51,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:51,793 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-16 19:28:51,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:51,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451394218] [2022-11-16 19:28:51,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451394218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:28:51,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666110850] [2022-11-16 19:28:51,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:28:51,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:51,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:28:51,795 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:28:51,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 19:28:51,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 19:28:51,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:28:51,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:28:51,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:28:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-16 19:28:52,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:28:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-16 19:28:52,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666110850] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:28:52,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [940798528] [2022-11-16 19:28:52,258 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:28:52,258 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:28:52,258 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:28:52,258 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:28:52,258 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:28:52,314 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-16 19:28:52,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-16 19:28:52,361 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:28:52,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:28:52,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:28:52,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:28:52,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:28:52,437 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:28:52,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:28:52,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:28:52,556 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:28:52,751 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6739#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:28:52,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:28:52,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:28:52,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-11-16 19:28:52,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951895153] [2022-11-16 19:28:52,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:28:52,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 19:28:52,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:52,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 19:28:52,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2022-11-16 19:28:52,753 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:28:53,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:53,041 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2022-11-16 19:28:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 19:28:53,041 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-16 19:28:53,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:53,042 INFO L225 Difference]: With dead ends: 62 [2022-11-16 19:28:53,042 INFO L226 Difference]: Without dead ends: 45 [2022-11-16 19:28:53,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 95 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=301, Invalid=1259, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 19:28:53,043 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:53,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 9 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:28:53,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-16 19:28:53,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-16 19:28:53,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 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) [2022-11-16 19:28:53,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-11-16 19:28:53,073 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 41 [2022-11-16 19:28:53,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:53,073 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-11-16 19:28:53,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:28:53,073 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-11-16 19:28:53,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 19:28:53,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:53,074 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:53,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 19:28:53,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:53,278 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:53,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:53,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1775187002, now seen corresponding path program 18 times [2022-11-16 19:28:53,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:53,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680388846] [2022-11-16 19:28:53,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:53,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 10 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:59,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:59,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680388846] [2022-11-16 19:28:59,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680388846] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:28:59,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948904246] [2022-11-16 19:28:59,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:28:59,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:59,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:28:59,236 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:28:59,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 19:28:59,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:28:59,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:28:59,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 122 conjunts are in the unsatisfiable core [2022-11-16 19:28:59,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:29:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 19:29:01,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:29:03,659 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:29:03,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 121 treesize of output 552 [2022-11-16 19:29:11,956 INFO L321 Elim1Store]: treesize reduction 504, result has 5.4 percent of original size [2022-11-16 19:29:11,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 120 treesize of output 47 [2022-11-16 19:29:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 19:29:12,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948904246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:29:12,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [859068708] [2022-11-16 19:29:12,058 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:29:12,059 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:29:12,059 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:29:12,059 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:29:12,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:29:12,107 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-16 19:29:12,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-16 19:29:12,154 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:29:12,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:29:12,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:29:12,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:29:12,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:29:12,233 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:29:12,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:29:12,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:29:12,357 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:29:12,948 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7296#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:29:12,948 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:29:12,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:29:12,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 20, 20] total 75 [2022-11-16 19:29:12,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179119749] [2022-11-16 19:29:12,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:29:12,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-16 19:29:12,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:29:12,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-16 19:29:12,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=6000, Unknown=0, NotChecked=0, Total=6320 [2022-11-16 19:29:12,950 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 75 states, 75 states have (on average 1.52) internal successors, (114), 75 states have internal predecessors, (114), 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) [2022-11-16 19:29:18,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:29:18,554 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2022-11-16 19:29:18,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-16 19:29:18,554 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.52) internal successors, (114), 75 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-16 19:29:18,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:29:18,555 INFO L225 Difference]: With dead ends: 79 [2022-11-16 19:29:18,555 INFO L226 Difference]: Without dead ends: 76 [2022-11-16 19:29:18,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3325 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=700, Invalid=11732, Unknown=0, NotChecked=0, Total=12432 [2022-11-16 19:29:18,557 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 1669 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:29:18,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 143 Invalid, 1783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1669 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 19:29:18,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-16 19:29:18,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2022-11-16 19:29:18,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:29:18,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2022-11-16 19:29:18,585 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 44 [2022-11-16 19:29:18,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:29:18,585 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2022-11-16 19:29:18,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.52) internal successors, (114), 75 states have internal predecessors, (114), 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) [2022-11-16 19:29:18,586 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2022-11-16 19:29:18,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 19:29:18,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:29:18,586 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:29:18,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 19:29:18,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-16 19:29:18,787 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:29:18,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:29:18,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1967093956, now seen corresponding path program 19 times [2022-11-16 19:29:18,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:29:18,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964694737] [2022-11-16 19:29:18,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:29:18,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:29:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-16 19:29:19,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:29:19,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964694737] [2022-11-16 19:29:19,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964694737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:29:19,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071349786] [2022-11-16 19:29:19,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:29:19,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:29:19,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:29:19,056 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:29:19,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 19:29:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:19,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:29:19,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:29:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-16 19:29:19,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:29:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-16 19:29:19,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071349786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:29:19,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [965147666] [2022-11-16 19:29:19,483 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:29:19,484 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:29:19,484 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:29:19,484 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:29:19,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:29:19,534 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-16 19:29:19,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-16 19:29:19,582 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:29:19,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:29:19,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:29:19,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:29:19,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:29:19,670 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-16 19:29:19,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-11-16 19:29:19,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:29:19,860 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:29:20,088 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7925#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:29:20,088 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:29:20,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:29:20,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 28 [2022-11-16 19:29:20,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605522772] [2022-11-16 19:29:20,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:29:20,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 19:29:20,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:29:20,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 19:29:20,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 19:29:20,090 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 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) [2022-11-16 19:29:20,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:29:20,456 INFO L93 Difference]: Finished difference Result 132 states and 147 transitions. [2022-11-16 19:29:20,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 19:29:20,459 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 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 45 [2022-11-16 19:29:20,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:29:20,460 INFO L225 Difference]: With dead ends: 132 [2022-11-16 19:29:20,460 INFO L226 Difference]: Without dead ends: 72 [2022-11-16 19:29:20,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 105 SyntacticMatches, 15 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=346, Invalid=1294, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 19:29:20,461 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 38 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:29:20,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 15 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:29:20,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-16 19:29:20,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2022-11-16 19:29:20,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.109375) internal successors, (71), 64 states have internal predecessors, (71), 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) [2022-11-16 19:29:20,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2022-11-16 19:29:20,490 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 45 [2022-11-16 19:29:20,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:29:20,490 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2022-11-16 19:29:20,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 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) [2022-11-16 19:29:20,490 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2022-11-16 19:29:20,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 19:29:20,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:29:20,491 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:29:20,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-16 19:29:20,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:29:20,691 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:29:20,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:29:20,691 INFO L85 PathProgramCache]: Analyzing trace with hash 976990629, now seen corresponding path program 20 times [2022-11-16 19:29:20,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:29:20,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269831055] [2022-11-16 19:29:20,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:29:20,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:29:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:20,976 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-16 19:29:20,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:29:20,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269831055] [2022-11-16 19:29:20,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269831055] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:29:20,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734246317] [2022-11-16 19:29:20,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:29:20,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:29:20,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:29:20,978 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:29:20,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 19:29:21,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 19:29:21,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:29:21,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:29:21,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:29:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-16 19:29:21,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:29:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-16 19:29:21,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734246317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:29:21,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [809558828] [2022-11-16 19:29:21,465 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:29:21,465 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:29:21,465 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:29:21,465 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:29:21,465 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:29:21,512 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-16 19:29:21,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-16 19:29:21,561 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:29:21,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:29:21,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:29:21,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:29:21,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:29:21,651 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-16 19:29:21,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-11-16 19:29:21,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:29:21,802 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:29:22,463 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8620#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:29:22,464 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:29:22,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:29:22,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-11-16 19:29:22,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012628565] [2022-11-16 19:29:22,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:29:22,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 19:29:22,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:29:22,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 19:29:22,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=899, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 19:29:22,465 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 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) [2022-11-16 19:29:22,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:29:22,818 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2022-11-16 19:29:22,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 19:29:22,821 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 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 46 [2022-11-16 19:29:22,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:29:22,821 INFO L225 Difference]: With dead ends: 69 [2022-11-16 19:29:22,822 INFO L226 Difference]: Without dead ends: 50 [2022-11-16 19:29:22,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 83 SyntacticMatches, 40 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=366, Invalid=1526, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 19:29:22,822 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:29:22,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 17 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:29:22,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-16 19:29:22,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-16 19:29:22,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:29:22,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-11-16 19:29:22,848 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 46 [2022-11-16 19:29:22,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:29:22,848 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-11-16 19:29:22,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 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) [2022-11-16 19:29:22,848 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-11-16 19:29:22,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-16 19:29:22,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:29:22,849 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:29:22,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 19:29:23,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:29:23,053 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:29:23,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:29:23,053 INFO L85 PathProgramCache]: Analyzing trace with hash 424409865, now seen corresponding path program 21 times [2022-11-16 19:29:23,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:29:23,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801325517] [2022-11-16 19:29:23,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:29:23,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:29:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:29:31,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:29:31,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801325517] [2022-11-16 19:29:31,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801325517] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:29:31,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035159549] [2022-11-16 19:29:31,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:29:31,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:29:31,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:29:31,191 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:29:31,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 19:29:31,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:29:31,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:29:31,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 147 conjunts are in the unsatisfiable core [2022-11-16 19:29:31,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:29:31,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 19:29:31,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 19:29:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 19:29:34,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:29:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 19:29:39,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035159549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:29:39,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [164904623] [2022-11-16 19:29:39,009 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:29:39,009 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:29:39,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:29:39,009 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:29:39,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:29:39,067 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:29:39,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:29:39,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:29:39,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:29:39,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:29:39,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:29:39,154 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:29:39,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:29:39,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:29:39,267 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:29:43,506 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9250#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:29:43,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:29:43,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:29:43,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 22, 30] total 92 [2022-11-16 19:29:43,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660631647] [2022-11-16 19:29:43,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:29:43,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-11-16 19:29:43,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:29:43,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-11-16 19:29:43,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=8893, Unknown=0, NotChecked=0, Total=9312 [2022-11-16 19:29:43,511 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 92 states, 92 states have (on average 1.391304347826087) internal successors, (128), 92 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:29:53,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:29:53,450 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2022-11-16 19:29:53,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-16 19:29:53,451 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.391304347826087) internal successors, (128), 92 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-16 19:29:53,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:29:53,452 INFO L225 Difference]: With dead ends: 87 [2022-11-16 19:29:53,452 INFO L226 Difference]: Without dead ends: 84 [2022-11-16 19:29:53,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 61 SyntacticMatches, 37 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5207 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=802, Invalid=15710, Unknown=0, NotChecked=0, Total=16512 [2022-11-16 19:29:53,454 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 2538 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 2538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:29:53,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 174 Invalid, 2679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 2538 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-16 19:29:53,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-16 19:29:53,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 70. [2022-11-16 19:29:53,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 69 states have internal predecessors, (77), 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) [2022-11-16 19:29:53,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2022-11-16 19:29:53,490 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 49 [2022-11-16 19:29:53,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:29:53,490 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2022-11-16 19:29:53,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.391304347826087) internal successors, (128), 92 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:29:53,491 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2022-11-16 19:29:53,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-16 19:29:53,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:29:53,491 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:29:53,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 19:29:53,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 19:29:53,692 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:29:53,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:29:53,692 INFO L85 PathProgramCache]: Analyzing trace with hash -852919811, now seen corresponding path program 22 times [2022-11-16 19:29:53,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:29:53,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849346918] [2022-11-16 19:29:53,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:29:53,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:29:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:53,967 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-16 19:29:53,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:29:53,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849346918] [2022-11-16 19:29:53,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849346918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:29:53,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815863639] [2022-11-16 19:29:53,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:29:53,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:29:53,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:29:53,969 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:29:53,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 19:29:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:54,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 19:29:54,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:29:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-16 19:29:54,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:29:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-16 19:29:54,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815863639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:29:54,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1186571739] [2022-11-16 19:29:54,501 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:29:54,501 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:29:54,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:29:54,501 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:29:54,502 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:29:54,549 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-16 19:29:54,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-16 19:29:54,595 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:29:54,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:29:54,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:29:54,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:29:54,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:29:54,672 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:29:54,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:29:54,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:29:54,793 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:29:55,687 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9942#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:29:55,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:29:55,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:29:55,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2022-11-16 19:29:55,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310083769] [2022-11-16 19:29:55,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:29:55,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 19:29:55,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:29:55,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 19:29:55,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=995, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 19:29:55,689 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:29:56,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:29:56,170 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2022-11-16 19:29:56,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 19:29:56,170 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-16 19:29:56,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:29:56,171 INFO L225 Difference]: With dead ends: 146 [2022-11-16 19:29:56,171 INFO L226 Difference]: Without dead ends: 79 [2022-11-16 19:29:56,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 90 SyntacticMatches, 44 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=418, Invalid=1562, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 19:29:56,172 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:29:56,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 17 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:29:56,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-16 19:29:56,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2022-11-16 19:29:56,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 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) [2022-11-16 19:29:56,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2022-11-16 19:29:56,212 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 50 [2022-11-16 19:29:56,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:29:56,212 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2022-11-16 19:29:56,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:29:56,212 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2022-11-16 19:29:56,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-16 19:29:56,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:29:56,213 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:29:56,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 19:29:56,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:29:56,413 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:29:56,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:29:56,414 INFO L85 PathProgramCache]: Analyzing trace with hash -247109324, now seen corresponding path program 23 times [2022-11-16 19:29:56,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:29:56,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962479483] [2022-11-16 19:29:56,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:29:56,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:29:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:56,753 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-16 19:29:56,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:29:56,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962479483] [2022-11-16 19:29:56,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962479483] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:29:56,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009400520] [2022-11-16 19:29:56,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:29:56,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:29:56,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:29:56,755 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:29:56,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 19:29:56,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 19:29:56,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:29:56,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 19:29:56,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:29:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-16 19:29:57,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:29:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-16 19:29:57,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009400520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:29:57,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [403907124] [2022-11-16 19:29:57,316 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:29:57,316 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:29:57,317 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:29:57,317 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:29:57,317 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:29:57,365 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:29:57,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:29:57,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:29:57,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:29:57,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:29:57,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:29:57,453 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:29:57,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:29:57,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:29:57,579 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:29:58,362 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10714#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:29:58,362 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:29:58,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:29:58,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-11-16 19:29:58,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049739938] [2022-11-16 19:29:58,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:29:58,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 19:29:58,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:29:58,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 19:29:58,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1067, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 19:29:58,364 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:29:58,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:29:58,753 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2022-11-16 19:29:58,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 19:29:58,753 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-16 19:29:58,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:29:58,754 INFO L225 Difference]: With dead ends: 76 [2022-11-16 19:29:58,754 INFO L226 Difference]: Without dead ends: 55 [2022-11-16 19:29:58,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 45 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=438, Invalid=1818, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 19:29:58,755 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:29:58,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 13 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:29:58,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-16 19:29:58,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-11-16 19:29:58,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 54 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:29:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-11-16 19:29:58,792 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 51 [2022-11-16 19:29:58,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:29:58,792 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-11-16 19:29:58,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:29:58,793 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-11-16 19:29:58,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 19:29:58,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:29:58,793 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:29:58,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 19:29:58,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 19:29:58,999 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:29:58,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:29:59,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1248847450, now seen corresponding path program 24 times [2022-11-16 19:29:59,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:29:59,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522235599] [2022-11-16 19:29:59,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:29:59,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:29:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:30:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 9 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:30:09,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:30:09,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522235599] [2022-11-16 19:30:09,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522235599] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:30:09,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560198752] [2022-11-16 19:30:09,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:30:09,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:30:09,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:30:09,614 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:30:09,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 19:30:09,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:30:09,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:30:09,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 154 conjunts are in the unsatisfiable core [2022-11-16 19:30:09,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:30:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 19:30:12,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:30:17,419 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:30:17,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 155 treesize of output 906 [2022-11-16 19:30:34,201 INFO L321 Elim1Store]: treesize reduction 846, result has 4.2 percent of original size [2022-11-16 19:30:34,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 154 treesize of output 59 [2022-11-16 19:30:34,331 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 19:30:34,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560198752] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:30:34,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [716015564] [2022-11-16 19:30:34,333 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:30:34,333 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:30:34,333 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:30:34,333 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:30:34,334 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:30:34,397 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:30:34,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:30:34,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:30:34,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:30:34,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:34,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:34,483 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:30:34,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:30:34,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:30:34,594 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:30:35,303 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11402#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:30:35,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:30:35,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:30:35,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 24, 24] total 93 [2022-11-16 19:30:35,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887815196] [2022-11-16 19:30:35,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:30:35,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-11-16 19:30:35,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:30:35,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-11-16 19:30:35,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=9021, Unknown=0, NotChecked=0, Total=9506 [2022-11-16 19:30:35,306 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 93 states, 93 states have (on average 1.5053763440860215) internal successors, (140), 93 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:30:47,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:30:47,989 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2022-11-16 19:30:47,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-16 19:30:47,989 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.5053763440860215) internal successors, (140), 93 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-16 19:30:47,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:30:47,990 INFO L225 Difference]: With dead ends: 95 [2022-11-16 19:30:47,990 INFO L226 Difference]: Without dead ends: 92 [2022-11-16 19:30:47,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6511 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=1360, Invalid=20692, Unknown=0, NotChecked=0, Total=22052 [2022-11-16 19:30:47,992 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 2394 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 2598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 2394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:30:47,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 175 Invalid, 2598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 2394 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-16 19:30:47,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-16 19:30:48,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2022-11-16 19:30:48,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.105263157894737) internal successors, (84), 76 states have internal predecessors, (84), 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) [2022-11-16 19:30:48,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2022-11-16 19:30:48,039 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 54 [2022-11-16 19:30:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:30:48,039 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2022-11-16 19:30:48,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.5053763440860215) internal successors, (140), 93 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:30:48,040 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2022-11-16 19:30:48,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 19:30:48,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:30:48,040 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:30:48,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-16 19:30:48,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 19:30:48,241 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:30:48,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:30:48,241 INFO L85 PathProgramCache]: Analyzing trace with hash 2141033884, now seen corresponding path program 25 times [2022-11-16 19:30:48,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:30:48,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649383379] [2022-11-16 19:30:48,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:30:48,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:30:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:30:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-16 19:30:48,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:30:48,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649383379] [2022-11-16 19:30:48,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649383379] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:30:48,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973725997] [2022-11-16 19:30:48,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:30:48,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:30:48,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:30:48,577 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:30:48,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 19:30:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:30:48,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 19:30:48,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:30:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-16 19:30:48,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:30:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-16 19:30:49,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973725997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:30:49,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1909250967] [2022-11-16 19:30:49,117 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:30:49,117 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:30:49,117 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:30:49,118 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:30:49,118 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:30:49,164 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-16 19:30:49,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-16 19:30:49,211 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:30:49,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:30:49,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:30:49,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:49,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:30:49,316 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-16 19:30:49,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-11-16 19:30:49,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:30:49,437 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:30:49,695 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12195#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:30:49,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:30:49,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:30:49,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 34 [2022-11-16 19:30:49,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956085271] [2022-11-16 19:30:49,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:30:49,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 19:30:49,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:30:49,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 19:30:49,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1170, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 19:30:49,697 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 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) [2022-11-16 19:30:50,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:30:50,203 INFO L93 Difference]: Finished difference Result 160 states and 175 transitions. [2022-11-16 19:30:50,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 19:30:50,204 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 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 55 [2022-11-16 19:30:50,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:30:50,204 INFO L225 Difference]: With dead ends: 160 [2022-11-16 19:30:50,205 INFO L226 Difference]: Without dead ends: 86 [2022-11-16 19:30:50,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 129 SyntacticMatches, 19 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=497, Invalid=1855, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 19:30:50,206 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:30:50,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 19 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:30:50,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-16 19:30:50,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2022-11-16 19:30:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0897435897435896) internal successors, (85), 78 states have internal predecessors, (85), 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) [2022-11-16 19:30:50,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2022-11-16 19:30:50,256 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 55 [2022-11-16 19:30:50,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:30:50,256 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2022-11-16 19:30:50,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 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) [2022-11-16 19:30:50,256 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2022-11-16 19:30:50,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 19:30:50,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:30:50,256 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:30:50,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 19:30:50,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 19:30:50,457 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:30:50,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:30:50,457 INFO L85 PathProgramCache]: Analyzing trace with hash -394686267, now seen corresponding path program 26 times [2022-11-16 19:30:50,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:30:50,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922853212] [2022-11-16 19:30:50,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:30:50,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:30:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:30:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-16 19:30:50,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:30:50,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922853212] [2022-11-16 19:30:50,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922853212] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:30:50,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893009265] [2022-11-16 19:30:50,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:30:50,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:30:50,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:30:50,762 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:30:50,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 19:30:50,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 19:30:50,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:30:50,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 19:30:50,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:30:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-16 19:30:51,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:30:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-16 19:30:51,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893009265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:30:51,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1500874157] [2022-11-16 19:30:51,395 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:30:51,395 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:30:51,395 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:30:51,396 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:30:51,396 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:30:51,458 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:30:51,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:30:51,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:30:51,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:30:51,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:51,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:51,555 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:30:51,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:30:51,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:30:51,676 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:30:51,892 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13044#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:30:51,892 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:30:51,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:30:51,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2022-11-16 19:30:51,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892236206] [2022-11-16 19:30:51,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:30:51,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 19:30:51,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:30:51,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 19:30:51,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1249, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 19:30:51,894 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:30:52,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:30:52,325 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2022-11-16 19:30:52,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 19:30:52,325 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-16 19:30:52,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:30:52,326 INFO L225 Difference]: With dead ends: 83 [2022-11-16 19:30:52,326 INFO L226 Difference]: Without dead ends: 60 [2022-11-16 19:30:52,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 132 SyntacticMatches, 20 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=517, Invalid=2135, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 19:30:52,327 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:30:52,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 13 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:30:52,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-16 19:30:52,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-16 19:30:52,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 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) [2022-11-16 19:30:52,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-11-16 19:30:52,360 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 56 [2022-11-16 19:30:52,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:30:52,360 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-11-16 19:30:52,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:30:52,360 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-11-16 19:30:52,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-16 19:30:52,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:30:52,361 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:30:52,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 19:30:52,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 19:30:52,567 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:30:52,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:30:52,567 INFO L85 PathProgramCache]: Analyzing trace with hash 2064065641, now seen corresponding path program 27 times [2022-11-16 19:30:52,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:30:52,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719187507] [2022-11-16 19:30:52,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:30:52,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:30:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:31:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 13 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:31:04,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:31:04,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719187507] [2022-11-16 19:31:04,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719187507] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:31:04,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632121015] [2022-11-16 19:31:04,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:31:04,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:31:04,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:31:04,758 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:31:04,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 19:31:04,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:31:04,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:31:04,925 WARN L261 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 172 conjunts are in the unsatisfiable core [2022-11-16 19:31:04,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:31:05,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 19:31:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-16 19:31:09,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:31:13,380 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-16 19:31:13,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632121015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:31:13,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1656574423] [2022-11-16 19:31:13,381 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:31:13,381 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:31:13,381 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:31:13,382 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:31:13,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:31:13,427 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-16 19:31:13,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-16 19:31:13,474 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:31:13,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:31:13,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:31:13,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:31:13,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:31:13,563 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-16 19:31:13,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-11-16 19:31:13,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:31:13,707 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:31:18,754 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13796#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:31:18,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:31:18,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:31:18,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 26, 25] total 101 [2022-11-16 19:31:18,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359221045] [2022-11-16 19:31:18,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:31:18,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-16 19:31:18,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:31:18,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-16 19:31:18,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=10573, Unknown=0, NotChecked=0, Total=11130 [2022-11-16 19:31:18,757 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 101 states, 101 states have (on average 1.5148514851485149) internal successors, (153), 101 states have internal predecessors, (153), 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) [2022-11-16 19:31:34,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:31:34,788 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2022-11-16 19:31:34,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-16 19:31:34,788 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.5148514851485149) internal successors, (153), 101 states have internal predecessors, (153), 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 59 [2022-11-16 19:31:34,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:31:34,789 INFO L225 Difference]: With dead ends: 103 [2022-11-16 19:31:34,789 INFO L226 Difference]: Without dead ends: 100 [2022-11-16 19:31:34,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 83 SyntacticMatches, 46 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10625 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=1589, Invalid=24493, Unknown=0, NotChecked=0, Total=26082 [2022-11-16 19:31:34,791 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 3356 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 3627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 3356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:31:34,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 225 Invalid, 3627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 3356 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-16 19:31:34,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-16 19:31:34,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2022-11-16 19:31:34,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 83 states have internal predecessors, (91), 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) [2022-11-16 19:31:34,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2022-11-16 19:31:34,844 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 59 [2022-11-16 19:31:34,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:31:34,845 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2022-11-16 19:31:34,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.5148514851485149) internal successors, (153), 101 states have internal predecessors, (153), 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) [2022-11-16 19:31:34,845 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2022-11-16 19:31:34,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-16 19:31:34,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:31:34,846 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:31:34,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-16 19:31:35,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 19:31:35,052 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:31:35,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:31:35,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1231103715, now seen corresponding path program 28 times [2022-11-16 19:31:35,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:31:35,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521507832] [2022-11-16 19:31:35,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:31:35,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:31:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:31:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-16 19:31:35,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:31:35,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521507832] [2022-11-16 19:31:35,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521507832] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:31:35,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200716684] [2022-11-16 19:31:35,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:31:35,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:31:35,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:31:35,393 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:31:35,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 19:31:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:31:35,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 19:31:35,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:31:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-16 19:31:35,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:31:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-16 19:31:36,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200716684] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:31:36,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1564108551] [2022-11-16 19:31:36,018 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:31:36,019 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:31:36,019 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:31:36,019 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:31:36,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:31:36,068 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:31:36,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:31:36,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:31:36,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:31:36,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:31:36,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:31:36,156 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-16 19:31:36,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-11-16 19:31:36,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:31:36,288 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:31:37,461 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14662#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:31:37,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:31:37,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:31:37,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 37 [2022-11-16 19:31:37,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278731101] [2022-11-16 19:31:37,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:31:37,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 19:31:37,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:31:37,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 19:31:37,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1359, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 19:31:37,464 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 37 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 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) [2022-11-16 19:31:38,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:31:38,074 INFO L93 Difference]: Finished difference Result 174 states and 189 transitions. [2022-11-16 19:31:38,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 19:31:38,074 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 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 60 [2022-11-16 19:31:38,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:31:38,075 INFO L225 Difference]: With dead ends: 174 [2022-11-16 19:31:38,075 INFO L226 Difference]: Without dead ends: 93 [2022-11-16 19:31:38,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 108 SyntacticMatches, 54 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2272 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=583, Invalid=2173, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 19:31:38,077 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 33 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:31:38,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 17 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:31:38,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-16 19:31:38,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2022-11-16 19:31:38,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 85 states have internal predecessors, (92), 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) [2022-11-16 19:31:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2022-11-16 19:31:38,135 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 60 [2022-11-16 19:31:38,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:31:38,135 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2022-11-16 19:31:38,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 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) [2022-11-16 19:31:38,135 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2022-11-16 19:31:38,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 19:31:38,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:31:38,144 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:31:38,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-16 19:31:38,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:31:38,349 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:31:38,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:31:38,350 INFO L85 PathProgramCache]: Analyzing trace with hash 889089940, now seen corresponding path program 29 times [2022-11-16 19:31:38,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:31:38,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807429212] [2022-11-16 19:31:38,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:31:38,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:31:38,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:31:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-16 19:31:38,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:31:38,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807429212] [2022-11-16 19:31:38,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807429212] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:31:38,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5794151] [2022-11-16 19:31:38,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:31:38,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:31:38,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:31:38,696 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:31:38,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-16 19:31:38,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-16 19:31:38,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:31:38,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 19:31:38,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:31:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-16 19:31:39,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:31:39,443 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-16 19:31:39,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5794151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:31:39,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [242178180] [2022-11-16 19:31:39,445 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:31:39,445 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:31:39,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:31:39,445 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:31:39,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:31:39,488 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-16 19:31:39,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-16 19:31:39,535 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:31:39,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:31:39,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:31:39,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:31:39,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:31:39,606 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:31:39,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:31:39,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:31:39,723 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:31:40,671 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15588#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:31:40,671 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:31:40,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:31:40,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2022-11-16 19:31:40,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919900557] [2022-11-16 19:31:40,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:31:40,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 19:31:40,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:31:40,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 19:31:40,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=1445, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 19:31:40,673 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 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) [2022-11-16 19:31:41,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:31:41,177 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2022-11-16 19:31:41,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 19:31:41,177 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 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 61 [2022-11-16 19:31:41,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:31:41,178 INFO L225 Difference]: With dead ends: 90 [2022-11-16 19:31:41,178 INFO L226 Difference]: Without dead ends: 65 [2022-11-16 19:31:41,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 55 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2986 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=603, Invalid=2477, Unknown=0, NotChecked=0, Total=3080 [2022-11-16 19:31:41,179 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:31:41,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 15 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:31:41,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-16 19:31:41,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-16 19:31:41,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.078125) internal successors, (69), 64 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:31:41,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-11-16 19:31:41,221 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 61 [2022-11-16 19:31:41,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:31:41,221 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-11-16 19:31:41,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 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) [2022-11-16 19:31:41,221 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-11-16 19:31:41,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 19:31:41,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:31:41,222 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:31:41,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-16 19:31:41,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-16 19:31:41,426 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:31:41,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:31:41,426 INFO L85 PathProgramCache]: Analyzing trace with hash 824688762, now seen corresponding path program 30 times [2022-11-16 19:31:41,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:31:41,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773310185] [2022-11-16 19:31:41,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:31:41,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:31:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:31:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 28 proven. 302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:31:59,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:31:59,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773310185] [2022-11-16 19:31:59,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773310185] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:31:59,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738643672] [2022-11-16 19:31:59,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:31:59,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:31:59,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:31:59,427 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:31:59,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-16 19:31:59,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:31:59,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:31:59,631 WARN L261 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 188 conjunts are in the unsatisfiable core [2022-11-16 19:31:59,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:31:59,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 19:32:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-16 19:32:04,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:32:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-16 19:32:09,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738643672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:32:09,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [500834477] [2022-11-16 19:32:09,974 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:32:09,974 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:32:09,974 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:32:09,974 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:32:09,975 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:32:10,030 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-16 19:32:10,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-16 19:32:10,084 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:32:10,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:32:10,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:32:10,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:32:10,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:32:10,184 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:32:10,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:32:10,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:32:10,303 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:32:11,214 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16405#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:32:11,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:32:11,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:32:11,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 28, 27] total 110 [2022-11-16 19:32:11,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342650456] [2022-11-16 19:32:11,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:32:11,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-11-16 19:32:11,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:32:11,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-11-16 19:32:11,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=12553, Unknown=0, NotChecked=0, Total=13110 [2022-11-16 19:32:11,217 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 110 states, 110 states have (on average 1.509090909090909) internal successors, (166), 110 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:32:32,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:32:32,526 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2022-11-16 19:32:32,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-16 19:32:32,527 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.509090909090909) internal successors, (166), 110 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-16 19:32:32,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:32:32,528 INFO L225 Difference]: With dead ends: 111 [2022-11-16 19:32:32,528 INFO L226 Difference]: Without dead ends: 108 [2022-11-16 19:32:32,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 130 SyntacticMatches, 10 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8353 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=1682, Invalid=28420, Unknown=0, NotChecked=0, Total=30102 [2022-11-16 19:32:32,530 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 3593 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 3844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 3593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:32:32,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 220 Invalid, 3844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 3593 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-16 19:32:32,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-16 19:32:32,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 91. [2022-11-16 19:32:32,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 90 states have internal predecessors, (98), 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) [2022-11-16 19:32:32,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2022-11-16 19:32:32,593 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 64 [2022-11-16 19:32:32,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:32:32,594 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2022-11-16 19:32:32,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.509090909090909) internal successors, (166), 110 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:32:32,594 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2022-11-16 19:32:32,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-16 19:32:32,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:32:32,595 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:32:32,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-16 19:32:32,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:32:32,795 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:32:32,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:32:32,796 INFO L85 PathProgramCache]: Analyzing trace with hash 87604220, now seen corresponding path program 31 times [2022-11-16 19:32:32,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:32:32,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358748204] [2022-11-16 19:32:32,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:32:32,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:32:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:32:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 67 proven. 77 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-11-16 19:32:33,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:32:33,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358748204] [2022-11-16 19:32:33,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358748204] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:32:33,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556915198] [2022-11-16 19:32:33,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:32:33,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:32:33,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:32:33,271 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:32:33,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-16 19:32:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:32:33,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 19:32:33,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:32:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-11-16 19:32:33,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:32:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-11-16 19:32:33,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556915198] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:32:33,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [778860820] [2022-11-16 19:32:33,992 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:32:33,993 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:32:33,993 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:32:33,993 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:32:33,993 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:32:34,044 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-16 19:32:34,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-16 19:32:34,090 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:32:34,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:32:34,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:32:34,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:32:34,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:32:34,164 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:32:34,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:32:34,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:32:34,279 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:32:34,559 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17340#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:32:34,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:32:34,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:32:34,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 40 [2022-11-16 19:32:34,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874128506] [2022-11-16 19:32:34,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:32:34,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 19:32:34,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:32:34,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 19:32:34,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=1562, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 19:32:34,561 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 40 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 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) [2022-11-16 19:32:35,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:32:35,269 INFO L93 Difference]: Finished difference Result 188 states and 203 transitions. [2022-11-16 19:32:35,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 19:32:35,274 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 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 65 [2022-11-16 19:32:35,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:32:35,274 INFO L225 Difference]: With dead ends: 188 [2022-11-16 19:32:35,274 INFO L226 Difference]: Without dead ends: 100 [2022-11-16 19:32:35,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 153 SyntacticMatches, 23 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=676, Invalid=2516, Unknown=0, NotChecked=0, Total=3192 [2022-11-16 19:32:35,275 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:32:35,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 13 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:32:35,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-16 19:32:35,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2022-11-16 19:32:35,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.076086956521739) internal successors, (99), 92 states have internal predecessors, (99), 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) [2022-11-16 19:32:35,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2022-11-16 19:32:35,355 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 65 [2022-11-16 19:32:35,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:32:35,355 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2022-11-16 19:32:35,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 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) [2022-11-16 19:32:35,355 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2022-11-16 19:32:35,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-16 19:32:35,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:32:35,356 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:32:35,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-16 19:32:35,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:32:35,556 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:32:35,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:32:35,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1815582693, now seen corresponding path program 32 times [2022-11-16 19:32:35,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:32:35,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517986868] [2022-11-16 19:32:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:32:35,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:32:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:32:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 55 proven. 89 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-16 19:32:36,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:32:36,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517986868] [2022-11-16 19:32:36,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517986868] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:32:36,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795351966] [2022-11-16 19:32:36,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:32:36,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:32:36,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:32:36,075 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:32:36,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-16 19:32:36,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-16 19:32:36,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:32:36,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 19:32:36,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:32:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-16 19:32:36,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:32:36,909 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-16 19:32:36,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795351966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:32:36,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2046541805] [2022-11-16 19:32:36,910 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:32:36,910 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:32:36,911 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:32:36,911 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:32:36,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:32:36,959 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-16 19:32:36,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-16 19:32:37,006 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:32:37,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:32:37,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:32:37,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:32:37,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:32:37,084 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:32:37,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:32:37,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:32:37,203 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:32:38,269 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18343#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:32:38,269 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:32:38,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:32:38,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2022-11-16 19:32:38,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407502] [2022-11-16 19:32:38,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:32:38,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-16 19:32:38,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:32:38,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-16 19:32:38,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1655, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 19:32:38,271 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 41 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 41 states have internal predecessors, (65), 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) [2022-11-16 19:32:38,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:32:38,882 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2022-11-16 19:32:38,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 19:32:38,882 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 41 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-16 19:32:38,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:32:38,883 INFO L225 Difference]: With dead ends: 97 [2022-11-16 19:32:38,883 INFO L226 Difference]: Without dead ends: 70 [2022-11-16 19:32:38,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 120 SyntacticMatches, 60 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3510 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=696, Invalid=2844, Unknown=0, NotChecked=0, Total=3540 [2022-11-16 19:32:38,883 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:32:38,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 17 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:32:38,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-16 19:32:38,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-11-16 19:32:38,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 states have internal predecessors, (74), 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) [2022-11-16 19:32:38,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2022-11-16 19:32:38,938 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 66 [2022-11-16 19:32:38,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:32:38,938 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2022-11-16 19:32:38,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 41 states have internal predecessors, (65), 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) [2022-11-16 19:32:38,938 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2022-11-16 19:32:38,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 19:32:38,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:32:38,939 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:32:38,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-16 19:32:39,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-16 19:32:39,145 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:32:39,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:32:39,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1006180919, now seen corresponding path program 33 times [2022-11-16 19:32:39,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:32:39,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006648104] [2022-11-16 19:32:39,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:32:39,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:32:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:32:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 24 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:32:56,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:32:56,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006648104] [2022-11-16 19:32:56,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006648104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:32:56,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556809183] [2022-11-16 19:32:56,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:32:56,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:32:56,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:32:56,411 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:32:56,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-16 19:32:56,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:32:56,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:32:56,608 WARN L261 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 206 conjunts are in the unsatisfiable core [2022-11-16 19:32:56,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:32:56,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 19:33:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-16 19:33:02,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-16 19:33:09,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556809183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:09,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2033351941] [2022-11-16 19:33:09,004 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:33:09,004 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:33:09,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:33:09,004 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:33:09,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:33:09,058 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:33:09,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:33:09,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:33:09,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:33:09,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:09,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:09,139 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:33:09,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:33:09,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:33:09,314 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:33:16,736 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19225#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:33:16,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:33:16,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:33:16,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 30, 29] total 119 [2022-11-16 19:33:16,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895740706] [2022-11-16 19:33:16,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:16,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-11-16 19:33:16,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:16,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-11-16 19:33:16,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=14584, Unknown=0, NotChecked=0, Total=15252 [2022-11-16 19:33:16,739 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 119 states, 119 states have (on average 1.504201680672269) internal successors, (179), 119 states have internal predecessors, (179), 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) [2022-11-16 19:33:41,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:41,070 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2022-11-16 19:33:41,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-16 19:33:41,070 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.504201680672269) internal successors, (179), 119 states have internal predecessors, (179), 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 69 [2022-11-16 19:33:41,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:41,071 INFO L225 Difference]: With dead ends: 119 [2022-11-16 19:33:41,071 INFO L226 Difference]: Without dead ends: 116 [2022-11-16 19:33:41,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 100 SyntacticMatches, 51 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14350 ImplicationChecksByTransitivity, 43.5s TimeCoverageRelationStatistics Valid=2062, Invalid=33848, Unknown=0, NotChecked=0, Total=35910 [2022-11-16 19:33:41,073 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 33 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 4337 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 4635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 4337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:41,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 254 Invalid, 4635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 4337 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-16 19:33:41,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-16 19:33:41,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 98. [2022-11-16 19:33:41,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 97 states have internal predecessors, (105), 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) [2022-11-16 19:33:41,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2022-11-16 19:33:41,148 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 69 [2022-11-16 19:33:41,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:41,149 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2022-11-16 19:33:41,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.504201680672269) internal successors, (179), 119 states have internal predecessors, (179), 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) [2022-11-16 19:33:41,149 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2022-11-16 19:33:41,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-16 19:33:41,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:41,150 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:41,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:41,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:41,356 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:41,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:41,356 INFO L85 PathProgramCache]: Analyzing trace with hash 117301309, now seen corresponding path program 34 times [2022-11-16 19:33:41,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:41,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593833180] [2022-11-16 19:33:41,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:41,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:41,779 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-11-16 19:33:41,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:41,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593833180] [2022-11-16 19:33:41,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593833180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:33:41,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563554367] [2022-11-16 19:33:41,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:33:41,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:41,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:41,781 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:41,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-16 19:33:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:41,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 19:33:41,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-11-16 19:33:42,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-11-16 19:33:42,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563554367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:42,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [971975616] [2022-11-16 19:33:42,600 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:33:42,601 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:33:42,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:33:42,601 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:33:42,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:33:42,649 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-16 19:33:42,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-16 19:33:42,697 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:33:42,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:33:42,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:33:42,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:42,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:42,783 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-16 19:33:42,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-11-16 19:33:42,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:33:42,938 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:33:44,454 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20237#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:33:44,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:33:44,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:33:44,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 43 [2022-11-16 19:33:44,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614997565] [2022-11-16 19:33:44,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:44,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 19:33:44,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:44,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 19:33:44,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=1779, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 19:33:44,456 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand has 43 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 43 states have internal predecessors, (55), 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) [2022-11-16 19:33:45,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:45,210 INFO L93 Difference]: Finished difference Result 202 states and 217 transitions. [2022-11-16 19:33:45,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 19:33:45,210 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 43 states have internal predecessors, (55), 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 70 [2022-11-16 19:33:45,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:45,211 INFO L225 Difference]: With dead ends: 202 [2022-11-16 19:33:45,211 INFO L226 Difference]: Without dead ends: 107 [2022-11-16 19:33:45,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 126 SyntacticMatches, 64 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3089 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=776, Invalid=2884, Unknown=0, NotChecked=0, Total=3660 [2022-11-16 19:33:45,212 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:45,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 15 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:33:45,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-16 19:33:45,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2022-11-16 19:33:45,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0707070707070707) internal successors, (106), 99 states have internal predecessors, (106), 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) [2022-11-16 19:33:45,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2022-11-16 19:33:45,303 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 70 [2022-11-16 19:33:45,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:45,303 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2022-11-16 19:33:45,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 43 states have internal predecessors, (55), 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) [2022-11-16 19:33:45,304 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2022-11-16 19:33:45,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 19:33:45,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:45,304 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:45,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:45,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-16 19:33:45,510 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:45,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:45,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1851191820, now seen corresponding path program 35 times [2022-11-16 19:33:45,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:45,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101719433] [2022-11-16 19:33:45,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:45,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:45,991 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 66 proven. 103 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-11-16 19:33:45,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:45,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101719433] [2022-11-16 19:33:45,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101719433] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:33:45,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833641876] [2022-11-16 19:33:45,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:33:45,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:45,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:45,993 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:45,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-16 19:33:46,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-16 19:33:46,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:33:46,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 19:33:46,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-11-16 19:33:46,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:47,006 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-11-16 19:33:47,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833641876] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:47,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [359988620] [2022-11-16 19:33:47,008 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:33:47,008 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:33:47,008 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:33:47,008 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:33:47,008 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:33:47,054 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-16 19:33:47,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-16 19:33:47,102 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:33:47,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:33:47,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:33:47,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:47,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:47,175 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:33:47,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:33:47,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:33:47,282 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:33:47,520 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21317#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:33:47,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:33:47,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:33:47,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2022-11-16 19:33:47,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831444924] [2022-11-16 19:33:47,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:47,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-16 19:33:47,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:47,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-16 19:33:47,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=1879, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 19:33:47,522 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 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) [2022-11-16 19:33:48,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:48,153 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2022-11-16 19:33:48,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 19:33:48,154 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 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 71 [2022-11-16 19:33:48,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:48,154 INFO L225 Difference]: With dead ends: 104 [2022-11-16 19:33:48,154 INFO L226 Difference]: Without dead ends: 75 [2022-11-16 19:33:48,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 168 SyntacticMatches, 26 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1970 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=796, Invalid=3236, Unknown=0, NotChecked=0, Total=4032 [2022-11-16 19:33:48,156 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 28 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:48,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 11 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:33:48,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-16 19:33:48,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-16 19:33:48,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 74 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:33:48,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2022-11-16 19:33:48,229 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 71 [2022-11-16 19:33:48,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:48,229 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2022-11-16 19:33:48,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 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) [2022-11-16 19:33:48,230 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2022-11-16 19:33:48,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 19:33:48,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:48,230 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:48,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:48,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-16 19:33:48,437 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:48,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:48,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1036205414, now seen corresponding path program 36 times [2022-11-16 19:33:48,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:48,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444605694] [2022-11-16 19:33:48,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:48,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 45 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:09,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:34:09,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444605694] [2022-11-16 19:34:09,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444605694] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:34:09,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016408916] [2022-11-16 19:34:09,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:34:09,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:09,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:09,595 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:34:09,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-16 19:34:09,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:34:09,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:34:09,795 WARN L261 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 218 conjunts are in the unsatisfiable core [2022-11-16 19:34:09,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:15,554 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 364 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-16 19:34:15,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:26,527 WARN L233 SmtUtils]: Spent 5.02s on a formula simplification that was a NOOP. DAG size: 586 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-16 19:34:26,528 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:34:26,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 26 select indices, 26 select index equivalence classes, 0 disjoint index pairs (out of 325 index pairs), introduced 26 new quantified variables, introduced 325 case distinctions, treesize of input 222 treesize of output 1877 [2022-11-16 19:38:58,402 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Maybe an infinite loop [2022-11-16 19:38:58,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1779070864] [2022-11-16 19:38:58,403 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:38:58,404 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:38:58,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:38:58,404 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:38:58,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:38:58,477 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:38:58,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:38:58,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:38:58,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:38:58,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:38:58,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:38:58,604 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:38:58,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:38:58,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:38:58,762 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:39:07,107 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22218#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:39:07,107 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:39:07,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:39:07,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2022-11-16 19:39:07,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56962381] [2022-11-16 19:39:07,107 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 19:39:07,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-16 19:39:07,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:39:07,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-16 19:39:07,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=878, Invalid=16678, Unknown=0, NotChecked=0, Total=17556 [2022-11-16 19:39:07,109 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 73 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 states have internal predecessors, (74), 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) [2022-11-16 19:39:20,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:39:20,754 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2022-11-16 19:39:20,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-16 19:39:20,754 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 states have internal predecessors, (74), 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 74 [2022-11-16 19:39:20,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:39:20,756 INFO L225 Difference]: With dead ends: 126 [2022-11-16 19:39:20,756 INFO L226 Difference]: Without dead ends: 123 [2022-11-16 19:39:20,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 93 SyntacticMatches, 53 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17612 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=1587, Invalid=25803, Unknown=0, NotChecked=0, Total=27390 [2022-11-16 19:39:20,758 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:39:20,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 128 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-16 19:39:20,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-16 19:39:20,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 105. [2022-11-16 19:39:20,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 104 states have internal predecessors, (112), 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) [2022-11-16 19:39:20,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 112 transitions. [2022-11-16 19:39:20,858 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 112 transitions. Word has length 74 [2022-11-16 19:39:20,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:39:20,859 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 112 transitions. [2022-11-16 19:39:20,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 states have internal predecessors, (74), 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) [2022-11-16 19:39:20,859 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 112 transitions. [2022-11-16 19:39:20,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-16 19:39:20,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:39:20,860 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:39:20,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-16 19:39:21,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-16 19:39:21,063 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:39:21,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:39:21,063 INFO L85 PathProgramCache]: Analyzing trace with hash 514587228, now seen corresponding path program 37 times [2022-11-16 19:39:21,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:39:21,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932119987] [2022-11-16 19:39:21,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:39:21,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:39:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:39:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 92 proven. 104 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-11-16 19:39:21,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:39:21,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932119987] [2022-11-16 19:39:21,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932119987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:39:21,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848206482] [2022-11-16 19:39:21,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:39:21,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:39:21,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:39:21,684 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:39:21,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-16 19:39:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:39:21,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 19:39:21,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:39:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-11-16 19:39:22,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:39:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-11-16 19:39:22,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848206482] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:39:22,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [792341216] [2022-11-16 19:39:22,914 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:39:22,915 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:39:22,915 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:39:22,915 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:39:22,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:39:22,977 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-16 19:39:22,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-16 19:39:23,036 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:39:23,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:39:23,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:39:23,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:39:23,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:39:23,125 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:39:23,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:39:23,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:39:23,286 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:39:25,362 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23225#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:39:25,362 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:39:25,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:39:25,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2022-11-16 19:39:25,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859954910] [2022-11-16 19:39:25,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:39:25,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 19:39:25,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:39:25,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 19:39:25,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 19:39:25,364 INFO L87 Difference]: Start difference. First operand 105 states and 112 transitions. Second operand has 46 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 46 states have internal predecessors, (58), 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) [2022-11-16 19:39:26,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:39:26,619 INFO L93 Difference]: Finished difference Result 216 states and 231 transitions. [2022-11-16 19:39:26,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 19:39:26,620 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 46 states have internal predecessors, (58), 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 75 [2022-11-16 19:39:26,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:39:26,621 INFO L225 Difference]: With dead ends: 216 [2022-11-16 19:39:26,621 INFO L226 Difference]: Without dead ends: 114 [2022-11-16 19:39:26,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 135 SyntacticMatches, 69 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3544 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=883, Invalid=3277, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 19:39:26,622 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 564 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:39:26,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 13 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [564 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 19:39:26,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-16 19:39:26,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2022-11-16 19:39:26,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0660377358490567) internal successors, (113), 106 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:39:26,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2022-11-16 19:39:26,748 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 75 [2022-11-16 19:39:26,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:39:26,749 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2022-11-16 19:39:26,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 46 states have internal predecessors, (58), 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) [2022-11-16 19:39:26,749 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2022-11-16 19:39:26,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-16 19:39:26,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:39:26,749 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:39:26,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-16 19:39:26,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-16 19:39:26,950 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:39:26,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:39:26,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1992571131, now seen corresponding path program 38 times [2022-11-16 19:39:26,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:39:26,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182628613] [2022-11-16 19:39:26,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:39:26,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:39:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:39:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 78 proven. 118 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-11-16 19:39:27,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:39:27,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182628613] [2022-11-16 19:39:27,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182628613] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:39:27,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788482136] [2022-11-16 19:39:27,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:39:27,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:39:27,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:39:27,622 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:39:27,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-16 19:39:28,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-16 19:39:28,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:39:28,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 19:39:28,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:39:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-11-16 19:39:28,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:39:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-11-16 19:39:28,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788482136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:39:28,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [618345436] [2022-11-16 19:39:28,938 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:39:28,938 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:39:28,938 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:39:28,939 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:39:28,939 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:39:29,001 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-16 19:39:29,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-16 19:39:29,058 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:39:29,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:39:29,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:39:29,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:39:29,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:39:29,142 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:39:29,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-11-16 19:39:29,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:39:29,285 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:39:29,597 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24382#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:39:29,597 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:39:29,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:39:29,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2022-11-16 19:39:29,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601828028] [2022-11-16 19:39:29,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:39:29,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-16 19:39:29,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:39:29,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-16 19:39:29,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=535, Invalid=2117, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 19:39:29,599 INFO L87 Difference]: Start difference. First operand 107 states and 113 transitions. Second operand has 47 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 47 states have internal predecessors, (90), 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) [2022-11-16 19:39:30,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:39:30,477 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2022-11-16 19:39:30,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 19:39:30,478 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 47 states have internal predecessors, (90), 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 76 [2022-11-16 19:39:30,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:39:30,478 INFO L225 Difference]: With dead ends: 111 [2022-11-16 19:39:30,478 INFO L226 Difference]: Without dead ends: 80 [2022-11-16 19:39:30,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 180 SyntacticMatches, 28 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2248 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=903, Invalid=3653, Unknown=0, NotChecked=0, Total=4556 [2022-11-16 19:39:30,479 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:39:30,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 17 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 19:39:30,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-16 19:39:30,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-16 19:39:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 79 states have internal predecessors, (84), 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) [2022-11-16 19:39:30,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2022-11-16 19:39:30,595 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 76 [2022-11-16 19:39:30,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:39:30,595 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2022-11-16 19:39:30,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 47 states have internal predecessors, (90), 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) [2022-11-16 19:39:30,596 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2022-11-16 19:39:30,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-16 19:39:30,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:39:30,596 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:39:30,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-16 19:39:30,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-16 19:39:30,804 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:39:30,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:39:30,805 INFO L85 PathProgramCache]: Analyzing trace with hash -605733079, now seen corresponding path program 39 times [2022-11-16 19:39:30,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:39:30,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955269690] [2022-11-16 19:39:30,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:39:30,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:39:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:40:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 37 proven. 488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:40:01,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:40:01,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955269690] [2022-11-16 19:40:01,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955269690] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:40:01,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642642527] [2022-11-16 19:40:01,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:40:01,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:40:01,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:40:01,311 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:40:01,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-16 19:40:01,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:40:01,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:40:01,617 WARN L261 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 236 conjunts are in the unsatisfiable core [2022-11-16 19:40:01,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:40:01,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 19:40:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-16 19:40:10,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:40:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-16 19:40:19,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642642527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:40:19,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [387718533] [2022-11-16 19:40:19,256 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:40:19,257 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:40:19,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:40:19,257 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:40:19,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:40:19,324 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-16 19:40:19,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-16 19:40:19,377 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:40:19,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:40:19,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:40:19,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:19,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:40:19,468 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-16 19:40:19,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-11-16 19:40:19,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:40:19,623 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:40:20,747 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25394#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:40:20,747 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:40:20,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:40:20,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 34, 33] total 137 [2022-11-16 19:40:20,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174788253] [2022-11-16 19:40:20,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:40:20,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-11-16 19:40:20,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:40:20,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-11-16 19:40:20,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=978, Invalid=19044, Unknown=0, NotChecked=0, Total=20022 [2022-11-16 19:40:20,752 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 137 states, 137 states have (on average 1.4963503649635037) internal successors, (205), 137 states have internal predecessors, (205), 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) [2022-11-16 19:41:00,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:41:00,495 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2022-11-16 19:41:00,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-16 19:41:00,496 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.4963503649635037) internal successors, (205), 137 states have internal predecessors, (205), 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 79 [2022-11-16 19:41:00,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:41:00,497 INFO L225 Difference]: With dead ends: 135 [2022-11-16 19:41:00,497 INFO L226 Difference]: Without dead ends: 132 [2022-11-16 19:41:00,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 160 SyntacticMatches, 13 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16351 ImplicationChecksByTransitivity, 57.1s TimeCoverageRelationStatistics Valid=2710, Invalid=44162, Unknown=0, NotChecked=0, Total=46872 [2022-11-16 19:41:00,501 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 5706 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 6035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 5706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:41:00,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 287 Invalid, 6035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 5706 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2022-11-16 19:41:00,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-16 19:41:00,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2022-11-16 19:41:00,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.072072072072072) internal successors, (119), 111 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:00,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 119 transitions. [2022-11-16 19:41:00,644 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 119 transitions. Word has length 79 [2022-11-16 19:41:00,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:41:00,644 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 119 transitions. [2022-11-16 19:41:00,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.4963503649635037) internal successors, (205), 137 states have internal predecessors, (205), 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) [2022-11-16 19:41:00,644 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 119 transitions. [2022-11-16 19:41:00,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-16 19:41:00,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:41:00,645 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:41:00,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-16 19:41:00,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-16 19:41:00,846 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:41:00,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:41:00,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1785950371, now seen corresponding path program 40 times [2022-11-16 19:41:00,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:41:00,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887486379] [2022-11-16 19:41:00,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:41:00,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:41:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:41:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 106 proven. 119 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-11-16 19:41:01,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:41:01,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887486379] [2022-11-16 19:41:01,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887486379] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:41:01,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159562311] [2022-11-16 19:41:01,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:41:01,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:01,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:41:01,571 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:41:01,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-16 19:41:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:41:01,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 19:41:01,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:41:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-11-16 19:41:02,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:41:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-11-16 19:41:02,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159562311] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:41:02,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [805270563] [2022-11-16 19:41:02,869 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:41:02,869 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:41:02,869 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:41:02,870 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:41:02,870 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:41:02,931 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:41:02,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:41:02,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:41:02,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:41:03,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:03,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:41:03,035 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-16 19:41:03,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-11-16 19:41:03,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:41:03,175 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:41:03,573 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26550#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:41:03,573 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:41:03,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:41:03,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 49 [2022-11-16 19:41:03,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530396097] [2022-11-16 19:41:03,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:41:03,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-16 19:41:03,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:41:03,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-16 19:41:03,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=607, Invalid=2255, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 19:41:03,576 INFO L87 Difference]: Start difference. First operand 112 states and 119 transitions. Second operand has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 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) [2022-11-16 19:41:04,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:41:04,787 INFO L93 Difference]: Finished difference Result 230 states and 245 transitions. [2022-11-16 19:41:04,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 19:41:04,788 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 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 80 [2022-11-16 19:41:04,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:41:04,789 INFO L225 Difference]: With dead ends: 230 [2022-11-16 19:41:04,789 INFO L226 Difference]: Without dead ends: 121 [2022-11-16 19:41:04,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 189 SyntacticMatches, 29 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=997, Invalid=3695, Unknown=0, NotChecked=0, Total=4692 [2022-11-16 19:41:04,791 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 37 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:41:04,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 21 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 19:41:04,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-16 19:41:04,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2022-11-16 19:41:04,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0619469026548674) internal successors, (120), 113 states have internal predecessors, (120), 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) [2022-11-16 19:41:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 120 transitions. [2022-11-16 19:41:04,956 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 120 transitions. Word has length 80 [2022-11-16 19:41:04,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:41:04,956 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 120 transitions. [2022-11-16 19:41:04,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 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) [2022-11-16 19:41:04,956 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 120 transitions. [2022-11-16 19:41:04,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-16 19:41:04,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:41:04,957 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:41:04,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-16 19:41:05,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-16 19:41:05,164 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:41:05,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:41:05,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1453374380, now seen corresponding path program 41 times [2022-11-16 19:41:05,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:41:05,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067135454] [2022-11-16 19:41:05,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:41:05,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:41:05,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:41:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 91 proven. 134 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-11-16 19:41:05,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:41:05,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067135454] [2022-11-16 19:41:05,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067135454] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:41:05,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300858879] [2022-11-16 19:41:05,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:41:05,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:05,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:41:05,931 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:41:05,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-16 19:41:06,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-16 19:41:06,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:41:06,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 19:41:06,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:41:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-11-16 19:41:06,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:41:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-11-16 19:41:07,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300858879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:41:07,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [208024405] [2022-11-16 19:41:07,502 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:41:07,502 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:41:07,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:41:07,503 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:41:07,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:41:07,568 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-16 19:41:07,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-16 19:41:07,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:41:07,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:41:07,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:07,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:41:07,678 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-16 19:41:07,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-11-16 19:41:07,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:41:07,822 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:41:08,185 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27784#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:41:08,186 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:41:08,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:41:08,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2022-11-16 19:41:08,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697456923] [2022-11-16 19:41:08,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:41:08,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-16 19:41:08,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:41:08,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-16 19:41:08,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=2369, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 19:41:08,188 INFO L87 Difference]: Start difference. First operand 114 states and 120 transitions. Second operand has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:09,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:41:09,202 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2022-11-16 19:41:09,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 19:41:09,203 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-11-16 19:41:09,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:41:09,204 INFO L225 Difference]: With dead ends: 118 [2022-11-16 19:41:09,204 INFO L226 Difference]: Without dead ends: 85 [2022-11-16 19:41:09,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 191 SyntacticMatches, 30 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1017, Invalid=4095, Unknown=0, NotChecked=0, Total=5112 [2022-11-16 19:41:09,205 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:41:09,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 15 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 19:41:09,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-16 19:41:09,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-11-16 19:41:09,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 84 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:09,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-11-16 19:41:09,306 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 81 [2022-11-16 19:41:09,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:41:09,306 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-11-16 19:41:09,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:09,307 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-11-16 19:41:09,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-16 19:41:09,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:41:09,307 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:41:09,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-16 19:41:09,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f58699f-47cf-4c69-adc1-2ad2d3ebdc0f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:09,509 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:41:09,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:41:09,509 INFO L85 PathProgramCache]: Analyzing trace with hash -2106266438, now seen corresponding path program 42 times [2022-11-16 19:41:09,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:41:09,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471000243] [2022-11-16 19:41:09,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:41:09,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:41:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat