./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI --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 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c --- 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-5e519f3 [2022-11-03 01:44:23,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:44:23,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:44:23,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:44:23,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:44:23,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:44:23,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:44:23,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:44:23,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:44:23,697 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:44:23,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:44:23,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:44:23,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:44:23,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:44:23,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:44:23,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:44:23,709 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:44:23,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:44:23,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:44:23,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:44:23,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:44:23,726 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:44:23,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:44:23,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:44:23,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:44:23,742 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:44:23,743 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:44:23,744 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:44:23,745 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:44:23,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:44:23,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:44:23,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:44:23,752 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:44:23,753 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:44:23,754 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:44:23,755 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:44:23,755 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:44:23,756 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:44:23,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:44:23,757 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:44:23,758 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:44:23,759 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:44:23,805 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:44:23,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:44:23,806 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:44:23,806 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:44:23,808 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:44:23,808 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:44:23,808 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:44:23,809 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:44:23,809 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:44:23,809 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:44:23,811 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:44:23,811 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:44:23,812 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:44:23,812 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:44:23,812 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:44:23,813 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:44:23,813 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:44:23,813 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:44:23,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:44:23,815 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:44:23,815 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:44:23,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:44:23,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:44:23,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:44:23,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:44:23,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:44:23,817 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:44:23,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:44:23,818 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:44:23,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:44:23,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:44:23,819 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:44:23,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:44:23,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:44:23,820 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:44:23,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:44:23,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:44:23,821 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:44:23,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:44:23,822 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:44:23,822 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:44:23,823 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_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c [2022-11-03 01:44:24,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:44:24,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:44:24,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:44:24,201 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:44:24,202 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:44:24,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2022-11-03 01:44:24,293 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/data/7c80af4c9/e73e4b4b90324b0ab26f95f89a24935c/FLAGf00345b02 [2022-11-03 01:44:24,843 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:44:24,843 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2022-11-03 01:44:24,852 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/data/7c80af4c9/e73e4b4b90324b0ab26f95f89a24935c/FLAGf00345b02 [2022-11-03 01:44:25,189 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/data/7c80af4c9/e73e4b4b90324b0ab26f95f89a24935c [2022-11-03 01:44:25,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:44:25,197 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:44:25,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:44:25,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:44:25,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:44:25,207 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:44:25" (1/1) ... [2022-11-03 01:44:25,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43bb1fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:25, skipping insertion in model container [2022-11-03 01:44:25,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:44:25" (1/1) ... [2022-11-03 01:44:25,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:44:25,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:44:25,491 WARN L230 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_b4a63cde-498f-44e3-a023-90081c1ea0fa/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2022-11-03 01:44:25,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:44:25,524 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:44:25,541 WARN L230 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_b4a63cde-498f-44e3-a023-90081c1ea0fa/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2022-11-03 01:44:25,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:44:25,587 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:44:25,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:25 WrapperNode [2022-11-03 01:44:25,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:44:25,589 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:44:25,589 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:44:25,589 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:44:25,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:25" (1/1) ... [2022-11-03 01:44:25,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:25" (1/1) ... [2022-11-03 01:44:25,641 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-11-03 01:44:25,642 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:44:25,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:44:25,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:44:25,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:44:25,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:25" (1/1) ... [2022-11-03 01:44:25,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:25" (1/1) ... [2022-11-03 01:44:25,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:25" (1/1) ... [2022-11-03 01:44:25,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:25" (1/1) ... [2022-11-03 01:44:25,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:25" (1/1) ... [2022-11-03 01:44:25,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:25" (1/1) ... [2022-11-03 01:44:25,688 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:25" (1/1) ... [2022-11-03 01:44:25,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:25" (1/1) ... [2022-11-03 01:44:25,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:44:25,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:44:25,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:44:25,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:44:25,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:25" (1/1) ... [2022-11-03 01:44:25,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:44:25,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:25,732 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:44:25,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:44:25,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:44:25,780 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 01:44:25,780 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 01:44:25,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:44:25,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:44:25,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:44:25,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:44:25,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:44:25,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:44:25,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:44:25,875 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:44:25,878 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:44:26,084 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:44:26,171 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:44:26,171 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 01:44:26,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:44:26 BoogieIcfgContainer [2022-11-03 01:44:26,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:44:26,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:44:26,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:44:26,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:44:26,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:44:25" (1/3) ... [2022-11-03 01:44:26,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f30fd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:44:26, skipping insertion in model container [2022-11-03 01:44:26,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:25" (2/3) ... [2022-11-03 01:44:26,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f30fd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:44:26, skipping insertion in model container [2022-11-03 01:44:26,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:44:26" (3/3) ... [2022-11-03 01:44:26,207 INFO L112 eAbstractionObserver]: Analyzing ICFG array_min_and_copy_shift_sum_add.c [2022-11-03 01:44:26,244 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:44:26,244 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:44:26,295 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:44:26,303 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;@d80c32d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:44:26,303 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:44:26,308 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 01:44:26,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 01:44:26,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:26,317 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:26,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:26,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:26,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1232094444, now seen corresponding path program 1 times [2022-11-03 01:44:26,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:26,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044302663] [2022-11-03 01:44:26,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:26,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:44:26,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:26,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044302663] [2022-11-03 01:44:26,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044302663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:26,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:26,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:44:26,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840539804] [2022-11-03 01:44:26,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:26,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:44:26,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:26,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:44:26,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:44:26,867 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:44:26,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:26,934 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-11-03 01:44:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:44:26,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2022-11-03 01:44:26,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:26,944 INFO L225 Difference]: With dead ends: 25 [2022-11-03 01:44:26,944 INFO L226 Difference]: Without dead ends: 16 [2022-11-03 01:44:26,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:44:26,950 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:26,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:44:26,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-03 01:44:26,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-03 01:44:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 01:44:27,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-03 01:44:27,001 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 14 [2022-11-03 01:44:27,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:27,004 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-03 01:44:27,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:44:27,005 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-03 01:44:27,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 01:44:27,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:27,008 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:27,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:44:27,009 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:27,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:27,010 INFO L85 PathProgramCache]: Analyzing trace with hash -460272811, now seen corresponding path program 1 times [2022-11-03 01:44:27,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:27,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815583157] [2022-11-03 01:44:27,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:27,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:44:27,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:27,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815583157] [2022-11-03 01:44:27,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815583157] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:27,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:27,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:44:27,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645538839] [2022-11-03 01:44:27,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:27,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:44:27,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:27,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:44:27,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:44:27,147 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:44:27,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:27,224 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2022-11-03 01:44:27,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:44:27,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2022-11-03 01:44:27,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:27,225 INFO L225 Difference]: With dead ends: 28 [2022-11-03 01:44:27,225 INFO L226 Difference]: Without dead ends: 20 [2022-11-03 01:44:27,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:44:27,227 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:27,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 35 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:44:27,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-03 01:44:27,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-11-03 01:44:27,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 01:44:27,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-11-03 01:44:27,234 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2022-11-03 01:44:27,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:27,235 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-11-03 01:44:27,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:44:27,236 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-11-03 01:44:27,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 01:44:27,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:27,237 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:27,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:44:27,237 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:27,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:27,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1912132504, now seen corresponding path program 1 times [2022-11-03 01:44:27,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:27,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375843645] [2022-11-03 01:44:27,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:27,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:44:28,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:28,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375843645] [2022-11-03 01:44:28,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375843645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:28,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912311253] [2022-11-03 01:44:28,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:28,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:28,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:28,238 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:28,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:44:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:28,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:44:28,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:28,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2022-11-03 01:44:28,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:44:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:44:28,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:29,035 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:44:29,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:44:29,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:44:29,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912311253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:29,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1759800505] [2022-11-03 01:44:29,181 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 01:44:29,182 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:44:29,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:44:29,193 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:44:29,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:44:29,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:29,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:29,568 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 01:44:29,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 01:44:29,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:29,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:29,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 41 [2022-11-03 01:44:32,104 INFO L356 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-11-03 01:44:32,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 262 treesize of output 308 [2022-11-03 01:44:33,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:33,097 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:44:33,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:44:33,273 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-03 01:44:33,275 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:44:34,805 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '304#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:44:34,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:44:34,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:44:34,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-11-03 01:44:34,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426933837] [2022-11-03 01:44:34,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:34,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 01:44:34,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:34,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 01:44:34,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 01:44:34,812 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 01:44:35,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:35,103 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-11-03 01:44:35,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:44:35,104 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 21 [2022-11-03 01:44:35,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:35,105 INFO L225 Difference]: With dead ends: 26 [2022-11-03 01:44:35,106 INFO L226 Difference]: Without dead ends: 23 [2022-11-03 01:44:35,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 01:44:35,108 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:35,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 94 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 175 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-11-03 01:44:35,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-03 01:44:35,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-11-03 01:44:35,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 01:44:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-11-03 01:44:35,116 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 21 [2022-11-03 01:44:35,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:35,117 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-11-03 01:44:35,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 01:44:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-11-03 01:44:35,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 01:44:35,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:35,119 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:35,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:35,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:35,333 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:35,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:35,333 INFO L85 PathProgramCache]: Analyzing trace with hash -853929431, now seen corresponding path program 2 times [2022-11-03 01:44:35,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:35,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179762193] [2022-11-03 01:44:35,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:35,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:44:35,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:35,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179762193] [2022-11-03 01:44:35,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179762193] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:35,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122104714] [2022-11-03 01:44:35,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:44:35,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:35,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:35,455 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:35,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:44:35,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:44:35,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:35,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:44:35,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:44:35,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:44:35,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122104714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:35,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [604626796] [2022-11-03 01:44:35,686 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 01:44:35,687 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:44:35,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:44:35,692 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:44:35,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:44:35,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:35,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:35,908 INFO L356 Elim1Store]: treesize reduction 70, result has 35.2 percent of original size [2022-11-03 01:44:35,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 59 [2022-11-03 01:44:35,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:35,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:36,040 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 01:44:36,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 01:44:37,823 INFO L356 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-11-03 01:44:37,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 262 treesize of output 308 [2022-11-03 01:44:38,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:38,590 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:44:38,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:44:38,746 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-03 01:44:38,748 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:44:39,960 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '530#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:44:39,960 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:44:39,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:44:39,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-03 01:44:39,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386999472] [2022-11-03 01:44:39,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:39,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:44:39,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:39,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:44:39,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:44:39,962 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 01:44:40,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:40,082 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-11-03 01:44:40,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:44:40,082 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 22 [2022-11-03 01:44:40,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:40,083 INFO L225 Difference]: With dead ends: 38 [2022-11-03 01:44:40,083 INFO L226 Difference]: Without dead ends: 28 [2022-11-03 01:44:40,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:44:40,085 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:40,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 58 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:44:40,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-03 01:44:40,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2022-11-03 01:44:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 01:44:40,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-11-03 01:44:40,092 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 22 [2022-11-03 01:44:40,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:40,092 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-11-03 01:44:40,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 01:44:40,092 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-11-03 01:44:40,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 01:44:40,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:40,094 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:40,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:40,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-03 01:44:40,314 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:40,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:40,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1239390197, now seen corresponding path program 3 times [2022-11-03 01:44:40,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:40,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527196674] [2022-11-03 01:44:40,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:40,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:44:40,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:40,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527196674] [2022-11-03 01:44:40,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527196674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:40,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693205814] [2022-11-03 01:44:40,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:44:40,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:40,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:40,510 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:40,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:44:40,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:44:40,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:40,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:44:40,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:44:40,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:44:40,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693205814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:40,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [784255094] [2022-11-03 01:44:40,696 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 01:44:40,696 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:44:40,697 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:44:40,697 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:44:40,697 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:44:40,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:40,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:40,847 INFO L356 Elim1Store]: treesize reduction 70, result has 35.2 percent of original size [2022-11-03 01:44:40,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 59 [2022-11-03 01:44:40,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:40,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:40,948 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 01:44:40,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 01:44:42,540 INFO L356 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-11-03 01:44:42,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 262 treesize of output 308 [2022-11-03 01:44:43,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:43,279 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:44:43,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:44:43,427 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-03 01:44:43,429 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:44:44,694 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '809#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:44:44,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:44:44,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:44:44,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-03 01:44:44,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033096817] [2022-11-03 01:44:44,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:44,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:44:44,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:44,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:44:44,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:44:44,697 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-03 01:44:44,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:44,867 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-11-03 01:44:44,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:44:44,869 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2022-11-03 01:44:44,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:44,870 INFO L225 Difference]: With dead ends: 26 [2022-11-03 01:44:44,870 INFO L226 Difference]: Without dead ends: 23 [2022-11-03 01:44:44,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-11-03 01:44:44,872 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:44,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 40 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:44:44,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-03 01:44:44,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-03 01:44:44,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 01:44:44,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-11-03 01:44:44,880 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 27 [2022-11-03 01:44:44,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:44,880 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-11-03 01:44:44,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-03 01:44:44,881 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-11-03 01:44:44,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 01:44:44,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:44,882 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:44,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:45,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:45,095 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:45,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:45,096 INFO L85 PathProgramCache]: Analyzing trace with hash -234104468, now seen corresponding path program 4 times [2022-11-03 01:44:45,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:45,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707381560] [2022-11-03 01:44:45,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:45,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:44:46,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:46,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707381560] [2022-11-03 01:44:46,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707381560] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:46,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634128513] [2022-11-03 01:44:46,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:44:46,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:46,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:46,837 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:46,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:44:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:46,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 01:44:46,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:46,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 01:44:47,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:47,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-03 01:44:47,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:47,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2022-11-03 01:44:47,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2022-11-03 01:44:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:44:47,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:48,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634128513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:48,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1045602637] [2022-11-03 01:44:48,620 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 01:44:48,620 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:44:48,620 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:44:48,621 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:44:48,621 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:44:48,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:48,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:48,785 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 01:44:48,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 01:44:48,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:48,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:48,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 41 [2022-11-03 01:44:50,257 INFO L356 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-11-03 01:44:50,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-03 01:44:50,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:50,337 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:44:50,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:44:50,464 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-03 01:44:50,466 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:44:52,262 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1054#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:44:52,263 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:44:52,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:44:52,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2022-11-03 01:44:52,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498558339] [2022-11-03 01:44:52,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:52,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 01:44:52,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:52,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 01:44:52,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 01:44:52,266 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 01:44:53,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:53,424 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2022-11-03 01:44:53,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 01:44:53,425 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 28 [2022-11-03 01:44:53,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:53,426 INFO L225 Difference]: With dead ends: 32 [2022-11-03 01:44:53,426 INFO L226 Difference]: Without dead ends: 29 [2022-11-03 01:44:53,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=315, Invalid=2765, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 01:44:53,429 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:53,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 66 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 214 Invalid, 0 Unknown, 42 Unchecked, 0.3s Time] [2022-11-03 01:44:53,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-03 01:44:53,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-11-03 01:44:53,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 01:44:53,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-11-03 01:44:53,451 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 28 [2022-11-03 01:44:53,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:53,451 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-11-03 01:44:53,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 01:44:53,452 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-11-03 01:44:53,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 01:44:53,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:53,454 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:53,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:53,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 01:44:53,675 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:53,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:53,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1332201173, now seen corresponding path program 5 times [2022-11-03 01:44:53,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:53,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609278856] [2022-11-03 01:44:53,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:53,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:44:53,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:53,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609278856] [2022-11-03 01:44:53,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609278856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:53,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071501590] [2022-11-03 01:44:53,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:44:53,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:53,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:53,915 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:53,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:44:54,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:44:54,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:54,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:44:54,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:44:54,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:54,180 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:44:54,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071501590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:54,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [361731068] [2022-11-03 01:44:54,183 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 01:44:54,183 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:44:54,184 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:44:54,184 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:44:54,185 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:44:54,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:54,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:54,400 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 01:44:54,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 01:44:54,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:54,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:54,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 41 [2022-11-03 01:44:55,956 INFO L356 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-11-03 01:44:55,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 261 treesize of output 307 [2022-11-03 01:44:56,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:56,612 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:44:56,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:44:56,752 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-03 01:44:56,753 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:44:58,124 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1363#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:44:58,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:44:58,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:44:58,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-11-03 01:44:58,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626590538] [2022-11-03 01:44:58,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:58,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:44:58,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:58,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:44:58,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-11-03 01:44:58,128 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-03 01:44:58,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:58,318 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2022-11-03 01:44:58,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:44:58,319 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 29 [2022-11-03 01:44:58,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:58,320 INFO L225 Difference]: With dead ends: 46 [2022-11-03 01:44:58,320 INFO L226 Difference]: Without dead ends: 33 [2022-11-03 01:44:58,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-11-03 01:44:58,321 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:58,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 66 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:44:58,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-03 01:44:58,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2022-11-03 01:44:58,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-03 01:44:58,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-11-03 01:44:58,331 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 29 [2022-11-03 01:44:58,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:58,332 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-11-03 01:44:58,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-03 01:44:58,332 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-11-03 01:44:58,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 01:44:58,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:58,333 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:58,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:58,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:58,559 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:58,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:58,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1861489079, now seen corresponding path program 6 times [2022-11-03 01:44:58,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:58,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121504967] [2022-11-03 01:44:58,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:58,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:44:58,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:58,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121504967] [2022-11-03 01:44:58,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121504967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:58,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348465154] [2022-11-03 01:44:58,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:44:58,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:58,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:58,725 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:58,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:44:58,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:44:58,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:58,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:44:58,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:58,895 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:44:58,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:44:58,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348465154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:58,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [446851548] [2022-11-03 01:44:58,987 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 01:44:58,989 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:44:58,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:44:58,990 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:44:58,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:44:59,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:59,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:59,193 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 01:44:59,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 01:44:59,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:59,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:59,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 41 [2022-11-03 01:45:00,718 INFO L356 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-11-03 01:45:00,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 262 treesize of output 308 [2022-11-03 01:45:01,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:01,373 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:45:01,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:45:01,521 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-03 01:45:01,523 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:45:02,757 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1713#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:45:02,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:45:02,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:45:02,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-03 01:45:02,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592586210] [2022-11-03 01:45:02,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:45:02,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:45:02,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:02,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:45:02,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-11-03 01:45:02,760 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:45:02,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:02,998 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-11-03 01:45:02,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:45:02,999 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), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 34 [2022-11-03 01:45:02,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:03,000 INFO L225 Difference]: With dead ends: 31 [2022-11-03 01:45:03,000 INFO L226 Difference]: Without dead ends: 28 [2022-11-03 01:45:03,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 01:45:03,002 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:03,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 54 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:45:03,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-03 01:45:03,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-03 01:45:03,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-03 01:45:03,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-11-03 01:45:03,012 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 34 [2022-11-03 01:45:03,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:03,013 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-11-03 01:45:03,013 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), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:45:03,013 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-11-03 01:45:03,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-03 01:45:03,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:03,015 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:03,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:03,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:03,219 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:03,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:03,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1872081512, now seen corresponding path program 7 times [2022-11-03 01:45:03,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:03,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97926020] [2022-11-03 01:45:03,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:03,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:45:06,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:06,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97926020] [2022-11-03 01:45:06,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97926020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:45:06,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762960761] [2022-11-03 01:45:06,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:45:06,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:06,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:06,135 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:45:06,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:45:06,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:06,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 01:45:06,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:06,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 01:45:06,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:06,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:06,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 48 treesize of output 49 [2022-11-03 01:45:06,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:06,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:06,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:06,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 63 [2022-11-03 01:45:07,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:07,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:07,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 128 treesize of output 83 [2022-11-03 01:45:07,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 47 [2022-11-03 01:45:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 01:45:07,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:10,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762960761] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:45:10,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1754508240] [2022-11-03 01:45:10,849 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 01:45:10,850 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:45:10,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:45:10,851 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:45:10,851 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:45:10,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:10,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:11,027 INFO L356 Elim1Store]: treesize reduction 70, result has 35.2 percent of original size [2022-11-03 01:45:11,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 59 [2022-11-03 01:45:11,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:11,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:11,150 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 01:45:11,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 01:45:12,500 INFO L356 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-11-03 01:45:12,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 261 treesize of output 307 [2022-11-03 01:45:12,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:12,804 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:45:12,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:45:12,944 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-03 01:45:12,945 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:45:15,200 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2015#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:45:15,200 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:45:15,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:45:15,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2022-11-03 01:45:15,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267893064] [2022-11-03 01:45:15,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:45:15,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 01:45:15,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:15,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 01:45:15,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2517, Unknown=0, NotChecked=0, Total=2756 [2022-11-03 01:45:15,204 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 31 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 01:45:16,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:16,487 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-11-03 01:45:16,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 01:45:16,488 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 35 [2022-11-03 01:45:16,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:16,489 INFO L225 Difference]: With dead ends: 38 [2022-11-03 01:45:16,489 INFO L226 Difference]: Without dead ends: 35 [2022-11-03 01:45:16,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=335, Invalid=3325, Unknown=0, NotChecked=0, Total=3660 [2022-11-03 01:45:16,492 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:16,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 91 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 411 Invalid, 0 Unknown, 35 Unchecked, 0.5s Time] [2022-11-03 01:45:16,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-03 01:45:16,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2022-11-03 01:45:16,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-03 01:45:16,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-11-03 01:45:16,504 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 35 [2022-11-03 01:45:16,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:16,505 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-11-03 01:45:16,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 01:45:16,506 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-11-03 01:45:16,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 01:45:16,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:16,507 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:16,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:16,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 01:45:16,711 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:16,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:16,711 INFO L85 PathProgramCache]: Analyzing trace with hash 2094520361, now seen corresponding path program 8 times [2022-11-03 01:45:16,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:16,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069637008] [2022-11-03 01:45:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:16,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:45:16,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:16,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069637008] [2022-11-03 01:45:16,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069637008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:45:16,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016335261] [2022-11-03 01:45:16,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:45:16,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:16,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:16,911 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:45:16,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:45:17,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:45:17,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:45:17,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:45:17,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:45:17,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:45:17,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016335261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:17,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1197004773] [2022-11-03 01:45:17,230 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 01:45:17,230 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:45:17,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:45:17,231 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:45:17,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:45:17,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:17,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:17,406 INFO L356 Elim1Store]: treesize reduction 70, result has 35.2 percent of original size [2022-11-03 01:45:17,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 59 [2022-11-03 01:45:17,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:17,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:17,525 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 01:45:17,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 01:45:18,793 INFO L356 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-11-03 01:45:18,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-03 01:45:18,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:18,872 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:45:18,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:45:19,006 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-03 01:45:19,007 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:45:20,466 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2383#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:45:20,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:45:20,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:45:20,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 17 [2022-11-03 01:45:20,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385590586] [2022-11-03 01:45:20,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:45:20,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 01:45:20,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:20,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 01:45:20,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-11-03 01:45:20,470 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:45:20,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:20,688 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-11-03 01:45:20,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:45:20,688 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 36 [2022-11-03 01:45:20,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:20,689 INFO L225 Difference]: With dead ends: 54 [2022-11-03 01:45:20,690 INFO L226 Difference]: Without dead ends: 38 [2022-11-03 01:45:20,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 82 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 01:45:20,691 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:20,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 62 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:45:20,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-03 01:45:20,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2022-11-03 01:45:20,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 01:45:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-11-03 01:45:20,703 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 36 [2022-11-03 01:45:20,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:20,704 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-11-03 01:45:20,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:45:20,704 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-11-03 01:45:20,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 01:45:20,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:20,706 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:20,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:20,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 01:45:20,915 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:20,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:20,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1854278795, now seen corresponding path program 9 times [2022-11-03 01:45:20,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:20,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693195264] [2022-11-03 01:45:20,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:20,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 01:45:21,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:21,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693195264] [2022-11-03 01:45:21,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693195264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:45:21,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143799741] [2022-11-03 01:45:21,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:45:21,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:21,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:21,134 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:45:21,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:45:21,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:45:21,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:45:21,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:45:21,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-03 01:45:21,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-03 01:45:21,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143799741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:21,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [445909724] [2022-11-03 01:45:21,471 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 01:45:21,472 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:45:21,472 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:45:21,472 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:45:21,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:45:21,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:21,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:21,687 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 01:45:21,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 01:45:21,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:21,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:21,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 41 [2022-11-03 01:45:22,918 INFO L356 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-11-03 01:45:22,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-03 01:45:22,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:22,990 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:45:22,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:45:23,104 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-03 01:45:23,108 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:45:24,295 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2804#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:45:24,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:45:24,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:45:24,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-03 01:45:24,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519521029] [2022-11-03 01:45:24,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:45:24,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 01:45:24,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:24,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 01:45:24,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2022-11-03 01:45:24,298 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 01:45:24,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:24,556 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-11-03 01:45:24,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:45:24,557 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 41 [2022-11-03 01:45:24,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:24,558 INFO L225 Difference]: With dead ends: 36 [2022-11-03 01:45:24,558 INFO L226 Difference]: Without dead ends: 33 [2022-11-03 01:45:24,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 01:45:24,560 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:24,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 61 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:45:24,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-03 01:45:24,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-03 01:45:24,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 01:45:24,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-11-03 01:45:24,573 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 41 [2022-11-03 01:45:24,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:24,574 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-11-03 01:45:24,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 01:45:24,574 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-11-03 01:45:24,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 01:45:24,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:24,575 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:24,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-03 01:45:24,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:24,787 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:24,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:24,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1648562708, now seen corresponding path program 10 times [2022-11-03 01:45:24,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:24,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24910777] [2022-11-03 01:45:24,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:24,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:45:31,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:31,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24910777] [2022-11-03 01:45:31,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24910777] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:45:31,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346348302] [2022-11-03 01:45:31,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:45:31,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:31,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:31,101 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:45:31,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:45:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:31,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 01:45:31,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:31,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 01:45:32,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:32,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:32,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:32,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:32,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:32,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:32,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:32,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 72 [2022-11-03 01:45:32,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:32,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:32,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:32,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:32,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 92 [2022-11-03 01:45:32,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:32,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:32,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:32,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:32,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:32,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 90 [2022-11-03 01:45:32,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:32,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:32,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:32,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 243 treesize of output 132 [2022-11-03 01:45:33,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 81 [2022-11-03 01:45:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:45:52,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:55,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346348302] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:45:55,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1877270635] [2022-11-03 01:45:55,860 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 01:45:55,860 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:45:55,860 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:45:55,860 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:45:55,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:45:55,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:55,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:55,991 INFO L356 Elim1Store]: treesize reduction 70, result has 35.2 percent of original size [2022-11-03 01:45:55,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 59 [2022-11-03 01:45:56,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:56,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:56,069 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 01:45:56,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 01:45:57,184 INFO L356 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-11-03 01:45:57,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 261 treesize of output 307 [2022-11-03 01:45:57,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:57,645 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:45:57,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:45:57,729 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-03 01:45:57,730 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:45:59,735 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3163#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:45:59,735 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:45:59,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:45:59,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 37 [2022-11-03 01:45:59,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537232120] [2022-11-03 01:45:59,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:45:59,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 01:45:59,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:59,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 01:45:59,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=3402, Unknown=0, NotChecked=0, Total=3660 [2022-11-03 01:45:59,738 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 37 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 01:46:02,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:02,211 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-11-03 01:46:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 01:46:02,212 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 42 [2022-11-03 01:46:02,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:02,213 INFO L225 Difference]: With dead ends: 44 [2022-11-03 01:46:02,213 INFO L226 Difference]: Without dead ends: 41 [2022-11-03 01:46:02,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=440, Invalid=5260, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 01:46:02,215 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:02,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 158 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 573 Invalid, 0 Unknown, 36 Unchecked, 0.6s Time] [2022-11-03 01:46:02,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-03 01:46:02,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2022-11-03 01:46:02,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 01:46:02,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2022-11-03 01:46:02,230 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 42 [2022-11-03 01:46:02,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:02,231 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2022-11-03 01:46:02,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 01:46:02,231 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2022-11-03 01:46:02,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 01:46:02,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:02,232 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:46:02,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:02,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:46:02,439 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:02,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:02,439 INFO L85 PathProgramCache]: Analyzing trace with hash 433668693, now seen corresponding path program 11 times [2022-11-03 01:46:02,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:46:02,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011458484] [2022-11-03 01:46:02,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:02,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:46:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 01:46:02,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:46:02,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011458484] [2022-11-03 01:46:02,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011458484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:46:02,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922681291] [2022-11-03 01:46:02,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:46:02,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:46:02,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:46:02,648 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:46:02,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 01:46:02,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 01:46:02,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:46:02,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:46:02,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-03 01:46:02,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-03 01:46:02,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922681291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:46:02,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1249007823] [2022-11-03 01:46:02,965 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 01:46:02,965 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:46:02,965 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:46:02,966 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:46:02,966 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:46:03,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:03,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:03,119 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 01:46:03,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 01:46:03,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:03,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:03,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 41 [2022-11-03 01:46:04,155 INFO L356 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-11-03 01:46:04,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 56 [2022-11-03 01:46:04,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:04,220 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:46:04,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:46:04,328 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-03 01:46:04,329 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:46:05,542 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3610#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:46:05,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:46:05,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:46:05,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 20 [2022-11-03 01:46:05,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691678326] [2022-11-03 01:46:05,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:46:05,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 01:46:05,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:46:05,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 01:46:05,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 01:46:05,545 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 01:46:05,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:05,748 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2022-11-03 01:46:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:46:05,748 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 43 [2022-11-03 01:46:05,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:05,749 INFO L225 Difference]: With dead ends: 62 [2022-11-03 01:46:05,749 INFO L226 Difference]: Without dead ends: 43 [2022-11-03 01:46:05,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 100 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=226, Invalid=1180, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 01:46:05,751 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:05,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 75 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:46:05,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-03 01:46:05,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2022-11-03 01:46:05,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 01:46:05,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-11-03 01:46:05,766 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 43 [2022-11-03 01:46:05,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:05,767 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-11-03 01:46:05,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 01:46:05,767 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-11-03 01:46:05,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 01:46:05,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:05,768 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:46:05,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:05,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 01:46:05,974 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:05,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:05,975 INFO L85 PathProgramCache]: Analyzing trace with hash 127792201, now seen corresponding path program 12 times [2022-11-03 01:46:05,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:46:05,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280934291] [2022-11-03 01:46:05,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:05,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:46:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 01:46:06,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:46:06,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280934291] [2022-11-03 01:46:06,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280934291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:46:06,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367325954] [2022-11-03 01:46:06,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:46:06,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:46:06,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:46:06,211 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:46:06,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 01:46:06,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:46:06,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:46:06,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:46:06,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 01:46:06,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 01:46:06,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367325954] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:46:06,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1026316647] [2022-11-03 01:46:06,559 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 01:46:06,559 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:46:06,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:46:06,560 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:46:06,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:46:06,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:06,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:06,741 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 01:46:06,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 01:46:06,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:06,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:06,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 41 [2022-11-03 01:46:07,759 INFO L356 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-11-03 01:46:07,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 261 treesize of output 307 [2022-11-03 01:46:08,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:08,188 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:46:08,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:46:08,296 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-03 01:46:08,297 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:46:09,445 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4102#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:46:09,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:46:09,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:46:09,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-03 01:46:09,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345662479] [2022-11-03 01:46:09,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:46:09,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 01:46:09,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:46:09,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 01:46:09,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 01:46:09,447 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-03 01:46:09,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:09,720 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-11-03 01:46:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:46:09,720 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 48 [2022-11-03 01:46:09,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:09,721 INFO L225 Difference]: With dead ends: 41 [2022-11-03 01:46:09,721 INFO L226 Difference]: Without dead ends: 38 [2022-11-03 01:46:09,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 115 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=268, Invalid=1538, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 01:46:09,723 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:09,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 98 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:46:09,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-03 01:46:09,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-03 01:46:09,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 01:46:09,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-11-03 01:46:09,739 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 48 [2022-11-03 01:46:09,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:09,740 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-11-03 01:46:09,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-03 01:46:09,740 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-11-03 01:46:09,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 01:46:09,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:09,741 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:46:09,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:09,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 01:46:09,946 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:09,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:09,947 INFO L85 PathProgramCache]: Analyzing trace with hash -333903976, now seen corresponding path program 13 times [2022-11-03 01:46:09,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:46:09,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246682701] [2022-11-03 01:46:09,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:09,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:46:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 01:46:39,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:46:39,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246682701] [2022-11-03 01:46:39,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246682701] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:46:39,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400835552] [2022-11-03 01:46:39,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:46:39,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:46:39,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:46:39,813 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:46:39,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 01:46:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:39,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-03 01:46:39,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:39,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 01:46:41,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 76 [2022-11-03 01:46:41,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:41,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 96 [2022-11-03 01:46:41,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:46:41,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 116 [2022-11-03 01:46:41,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 118 [2022-11-03 01:46:41,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:41,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 396 treesize of output 191 [2022-11-03 01:46:43,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 11 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 405 treesize of output 125 [2022-11-03 01:46:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 01:46:50,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:04,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400835552] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:47:04,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1974229406] [2022-11-03 01:47:04,810 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 01:47:04,811 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:47:04,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:47:04,811 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:47:04,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:47:04,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:04,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:04,996 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 01:47:04,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 01:47:05,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:05,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:05,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 41 [2022-11-03 01:47:06,113 INFO L356 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-11-03 01:47:06,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 262 treesize of output 308 [2022-11-03 01:47:06,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:47:06,527 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:47:06,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:47:06,652 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-03 01:47:06,653 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:47:09,635 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4517#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:47:09,635 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:47:09,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:47:09,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-11-03 01:47:09,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492560402] [2022-11-03 01:47:09,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:47:09,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 01:47:09,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:47:09,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 01:47:09,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=4223, Unknown=3, NotChecked=0, Total=4556 [2022-11-03 01:47:09,639 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 42 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-03 01:47:12,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:12,323 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2022-11-03 01:47:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:47:12,324 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 49 [2022-11-03 01:47:12,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:12,325 INFO L225 Difference]: With dead ends: 50 [2022-11-03 01:47:12,325 INFO L226 Difference]: Without dead ends: 47 [2022-11-03 01:47:12,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=471, Invalid=5688, Unknown=3, NotChecked=0, Total=6162 [2022-11-03 01:47:12,328 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:12,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 126 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 674 Invalid, 0 Unknown, 32 Unchecked, 0.8s Time] [2022-11-03 01:47:12,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-03 01:47:12,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2022-11-03 01:47:12,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 01:47:12,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-11-03 01:47:12,351 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 49 [2022-11-03 01:47:12,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:12,351 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-11-03 01:47:12,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-03 01:47:12,352 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-11-03 01:47:12,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 01:47:12,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:12,353 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:12,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:12,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:12,563 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:12,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:12,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1761583575, now seen corresponding path program 14 times [2022-11-03 01:47:12,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:47:12,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236332911] [2022-11-03 01:47:12,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:12,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:47:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 16 proven. 40 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 01:47:12,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:47:12,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236332911] [2022-11-03 01:47:12,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236332911] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:47:12,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767332485] [2022-11-03 01:47:12,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:47:12,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:12,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:12,879 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:12,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 01:47:12,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 01:47:12,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:47:12,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:47:12,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 01:47:13,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 01:47:13,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767332485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:13,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1993081410] [2022-11-03 01:47:13,261 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 01:47:13,261 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:47:13,262 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:47:13,262 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:47:13,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:47:13,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:13,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:13,442 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 01:47:13,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 01:47:13,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:13,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:13,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 41 [2022-11-03 01:47:14,491 INFO L356 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-11-03 01:47:14,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 56 [2022-11-03 01:47:14,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:47:14,563 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:47:14,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:47:14,701 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-03 01:47:14,702 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:47:16,110 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5021#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:47:16,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:47:16,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:47:16,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 23 [2022-11-03 01:47:16,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391603538] [2022-11-03 01:47:16,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:47:16,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 01:47:16,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:47:16,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 01:47:16,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 01:47:16,113 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-03 01:47:16,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:16,381 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-11-03 01:47:16,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 01:47:16,383 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 50 [2022-11-03 01:47:16,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:16,383 INFO L225 Difference]: With dead ends: 70 [2022-11-03 01:47:16,384 INFO L226 Difference]: Without dead ends: 48 [2022-11-03 01:47:16,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 118 SyntacticMatches, 11 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=279, Invalid=1443, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 01:47:16,385 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:16,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 88 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:47:16,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-03 01:47:16,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2022-11-03 01:47:16,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 01:47:16,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2022-11-03 01:47:16,401 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 50 [2022-11-03 01:47:16,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:16,402 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2022-11-03 01:47:16,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-03 01:47:16,402 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2022-11-03 01:47:16,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 01:47:16,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:16,403 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:16,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:16,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 01:47:16,603 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:16,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:16,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1401605877, now seen corresponding path program 15 times [2022-11-03 01:47:16,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:47:16,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298523696] [2022-11-03 01:47:16,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:16,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:47:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 22 proven. 44 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 01:47:16,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:47:16,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298523696] [2022-11-03 01:47:16,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298523696] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:47:16,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104597020] [2022-11-03 01:47:16,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:47:16,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:16,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:16,890 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:16,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 01:47:17,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:47:17,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:47:17,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:47:17,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-03 01:47:17,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-03 01:47:17,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104597020] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:17,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1570031085] [2022-11-03 01:47:17,356 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 01:47:17,356 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:47:17,357 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:47:17,357 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:47:17,357 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:47:17,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:17,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:17,527 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 01:47:17,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 01:47:17,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:17,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:17,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 41 [2022-11-03 01:47:18,618 INFO L356 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-11-03 01:47:18,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 261 treesize of output 307 [2022-11-03 01:47:18,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:47:18,927 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:47:18,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:47:19,036 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-03 01:47:19,038 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:47:20,305 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5584#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:47:20,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:47:20,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:47:20,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-11-03 01:47:20,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105778049] [2022-11-03 01:47:20,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:47:20,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 01:47:20,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:47:20,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 01:47:20,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 01:47:20,308 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-03 01:47:20,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:20,779 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2022-11-03 01:47:20,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 01:47:20,783 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 55 [2022-11-03 01:47:20,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:20,784 INFO L225 Difference]: With dead ends: 46 [2022-11-03 01:47:20,784 INFO L226 Difference]: Without dead ends: 43 [2022-11-03 01:47:20,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 133 SyntacticMatches, 12 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=336, Invalid=1920, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 01:47:20,786 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 15 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:20,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 108 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:47:20,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-03 01:47:20,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-03 01:47:20,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 01:47:20,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2022-11-03 01:47:20,813 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 55 [2022-11-03 01:47:20,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:20,814 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2022-11-03 01:47:20,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-03 01:47:20,814 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2022-11-03 01:47:20,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 01:47:20,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:20,816 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:20,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:21,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a63cde-498f-44e3-a023-90081c1ea0fa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 01:47:21,019 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:21,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:21,019 INFO L85 PathProgramCache]: Analyzing trace with hash 499614316, now seen corresponding path program 16 times [2022-11-03 01:47:21,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:47:21,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225202615] [2022-11-03 01:47:21,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:21,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:47:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat