./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/insertion_sort-1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/insertion_sort-1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 36d1103e69366c6d9110aa7e24b0c4765120510facc121d7623fcf9373a67e96 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 13:50:25,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:50:25,608 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:50:25,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:50:25,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:50:25,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:50:25,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:50:25,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:50:25,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:50:25,651 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:50:25,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:50:25,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:50:25,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:50:25,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:50:25,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:50:25,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:50:25,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:50:25,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:50:25,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:50:25,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:50:25,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:50:25,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:50:25,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:50:25,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:50:25,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:50:25,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:50:25,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:50:25,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:50:25,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:50:25,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:50:25,693 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:50:25,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:50:25,700 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:50:25,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:50:25,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:50:25,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:50:25,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:50:25,705 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:50:25,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:50:25,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:50:25,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:50:25,710 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 13:50:25,754 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:50:25,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:50:25,756 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:50:25,756 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:50:25,757 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:50:25,757 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:50:25,757 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:50:25,758 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:50:25,758 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:50:25,758 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:50:25,759 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:50:25,760 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:50:25,760 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:50:25,760 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:50:25,760 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:50:25,761 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:50:25,761 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:50:25,761 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:50:25,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:50:25,762 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:50:25,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:50:25,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:50:25,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:50:25,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 13:50:25,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:50:25,764 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 13:50:25,764 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:50:25,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 13:50:25,765 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:50:25,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 13:50:25,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:50:25,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:50:25,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:50:25,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:50:25,767 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:50:25,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:50:25,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 13:50:25,768 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:50:25,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:50:25,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 13:50:25,769 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:50:25,769 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_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 36d1103e69366c6d9110aa7e24b0c4765120510facc121d7623fcf9373a67e96 [2022-11-23 13:50:26,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:50:26,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:50:26,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:50:26,092 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:50:26,093 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:50:26,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/loops/insertion_sort-1-2.c [2022-11-23 13:50:29,197 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:50:29,366 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:50:29,367 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/sv-benchmarks/c/loops/insertion_sort-1-2.c [2022-11-23 13:50:29,373 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/data/22a3a0989/69362b418e1e47f782e8cd5f0bf5beea/FLAGb5a90185e [2022-11-23 13:50:29,389 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/data/22a3a0989/69362b418e1e47f782e8cd5f0bf5beea [2022-11-23 13:50:29,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:50:29,393 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:50:29,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:50:29,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:50:29,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:50:29,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:50:29" (1/1) ... [2022-11-23 13:50:29,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24f3954e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:29, skipping insertion in model container [2022-11-23 13:50:29,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:50:29" (1/1) ... [2022-11-23 13:50:29,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:50:29,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:50:29,577 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/sv-benchmarks/c/loops/insertion_sort-1-2.c[330,343] [2022-11-23 13:50:29,606 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:50:29,616 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:50:29,630 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/sv-benchmarks/c/loops/insertion_sort-1-2.c[330,343] [2022-11-23 13:50:29,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:50:29,673 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:50:29,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:29 WrapperNode [2022-11-23 13:50:29,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:50:29,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:50:29,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:50:29,676 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:50:29,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:29" (1/1) ... [2022-11-23 13:50:29,700 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:29" (1/1) ... [2022-11-23 13:50:29,729 INFO L138 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2022-11-23 13:50:29,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:50:29,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:50:29,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:50:29,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:50:29,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:29" (1/1) ... [2022-11-23 13:50:29,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:29" (1/1) ... [2022-11-23 13:50:29,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:29" (1/1) ... [2022-11-23 13:50:29,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:29" (1/1) ... [2022-11-23 13:50:29,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:29" (1/1) ... [2022-11-23 13:50:29,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:29" (1/1) ... [2022-11-23 13:50:29,777 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:29" (1/1) ... [2022-11-23 13:50:29,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:29" (1/1) ... [2022-11-23 13:50:29,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:50:29,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:50:29,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:50:29,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:50:29,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:29" (1/1) ... [2022-11-23 13:50:29,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:50:29,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:29,825 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:50:29,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:50:29,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:50:29,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 13:50:29,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 13:50:29,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 13:50:29,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:50:29,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:50:29,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 13:50:29,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 13:50:29,954 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:50:29,957 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:50:30,137 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:50:30,242 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:50:30,252 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 13:50:30,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:50:30 BoogieIcfgContainer [2022-11-23 13:50:30,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:50:30,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:50:30,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:50:30,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:50:30,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:50:29" (1/3) ... [2022-11-23 13:50:30,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab66f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:50:30, skipping insertion in model container [2022-11-23 13:50:30,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:29" (2/3) ... [2022-11-23 13:50:30,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab66f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:50:30, skipping insertion in model container [2022-11-23 13:50:30,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:50:30" (3/3) ... [2022-11-23 13:50:30,272 INFO L112 eAbstractionObserver]: Analyzing ICFG insertion_sort-1-2.c [2022-11-23 13:50:30,294 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:50:30,295 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 13:50:30,363 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:50:30,371 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;@57c5d9be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:50:30,372 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 13:50:30,379 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:50:30,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 13:50:30,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:30,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:30,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:30,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:30,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1323722535, now seen corresponding path program 1 times [2022-11-23 13:50:30,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:30,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213420322] [2022-11-23 13:50:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:30,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:50:30,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:30,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213420322] [2022-11-23 13:50:30,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213420322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:50:30,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:50:30,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:50:30,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187538801] [2022-11-23 13:50:30,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:30,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:50:30,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:30,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:50:30,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:50:30,894 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:50:30,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:30,988 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2022-11-23 13:50:30,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:50:30,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 13:50:30,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:31,000 INFO L225 Difference]: With dead ends: 32 [2022-11-23 13:50:31,001 INFO L226 Difference]: Without dead ends: 16 [2022-11-23 13:50:31,004 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 [2022-11-23 13:50:31,008 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:31,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 17 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:50:31,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-23 13:50:31,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2022-11-23 13:50:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:50:31,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-23 13:50:31,071 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 7 [2022-11-23 13:50:31,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:31,072 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-23 13:50:31,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:50:31,073 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-23 13:50:31,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 13:50:31,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:31,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:31,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 13:50:31,095 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:31,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:31,096 INFO L85 PathProgramCache]: Analyzing trace with hash 357824212, now seen corresponding path program 1 times [2022-11-23 13:50:31,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:31,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128697487] [2022-11-23 13:50:31,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:31,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:50:31,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:31,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128697487] [2022-11-23 13:50:31,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128697487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:50:31,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:50:31,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:50:31,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263070078] [2022-11-23 13:50:31,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:31,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:50:31,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:31,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:50:31,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:50:31,283 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:50:31,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:31,336 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-11-23 13:50:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:50:31,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 13:50:31,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:31,338 INFO L225 Difference]: With dead ends: 24 [2022-11-23 13:50:31,338 INFO L226 Difference]: Without dead ends: 14 [2022-11-23 13:50:31,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:50:31,340 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:31,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:50:31,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-23 13:50:31,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-23 13:50:31,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:50:31,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-11-23 13:50:31,344 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 11 [2022-11-23 13:50:31,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:31,344 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-11-23 13:50:31,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:50:31,345 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-11-23 13:50:31,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 13:50:31,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:31,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:31,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 13:50:31,346 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:31,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:31,347 INFO L85 PathProgramCache]: Analyzing trace with hash -549655058, now seen corresponding path program 1 times [2022-11-23 13:50:31,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:31,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229889200] [2022-11-23 13:50:31,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:31,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:50:31,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:31,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229889200] [2022-11-23 13:50:31,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229889200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:31,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066682922] [2022-11-23 13:50:31,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:31,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:31,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:31,519 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:50:31,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 13:50:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:31,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 13:50:31,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:50:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:50:31,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:50:31,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:50:31,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066682922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:50:31,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1190331124] [2022-11-23 13:50:31,801 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 13:50:31,801 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:50:31,805 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:50:31,811 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:50:31,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:50:31,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:31,935 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 13:50:31,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 13:50:31,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:32,008 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 13:50:32,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 13:50:32,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:32,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 13:50:32,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:32,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:32,331 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 13:50:32,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 253 treesize of output 241 [2022-11-23 13:50:32,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 13:50:32,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:32,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:50:32,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-11-23 13:50:32,685 INFO L321 Elim1Store]: treesize reduction 162, result has 9.0 percent of original size [2022-11-23 13:50:32,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 116 [2022-11-23 13:50:32,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 13:50:32,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 13:50:32,933 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:50:33,545 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '224#(and (= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (< (mod |ULTIMATE.start_main_~k~0#1| 4294967296) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_main_~#v~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 13:50:33,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:50:33,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:50:33,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-23 13:50:33,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384933776] [2022-11-23 13:50:33,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:50:33,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 13:50:33,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:33,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 13:50:33,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-23 13:50:33,550 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:50:33,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:33,638 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2022-11-23 13:50:33,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:50:33,639 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 13:50:33,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:33,640 INFO L225 Difference]: With dead ends: 28 [2022-11-23 13:50:33,640 INFO L226 Difference]: Without dead ends: 18 [2022-11-23 13:50:33,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-23 13:50:33,643 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:33,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:50:33,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-23 13:50:33,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2022-11-23 13:50:33,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:50:33,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-23 13:50:33,648 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 12 [2022-11-23 13:50:33,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:33,649 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-23 13:50:33,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:50:33,649 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-23 13:50:33,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 13:50:33,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:33,650 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:33,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 13:50:33,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:33,856 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:33,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:33,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1383258644, now seen corresponding path program 2 times [2022-11-23 13:50:33,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:33,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034746496] [2022-11-23 13:50:33,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:33,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:34,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:50:34,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:34,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034746496] [2022-11-23 13:50:34,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034746496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:34,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445910852] [2022-11-23 13:50:34,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:50:34,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:34,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:34,843 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:50:34,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 13:50:34,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 13:50:34,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:50:34,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 13:50:34,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:50:35,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-23 13:50:35,150 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:50:35,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-23 13:50:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:50:35,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:50:35,336 INFO L350 Elim1Store]: Elim1 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 57 treesize of output 51 [2022-11-23 13:50:35,367 INFO L321 Elim1Store]: treesize reduction 5, result has 76.2 percent of original size [2022-11-23 13:50:35,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 96 [2022-11-23 13:50:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:50:35,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445910852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:50:35,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [449637435] [2022-11-23 13:50:35,484 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 13:50:35,486 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:50:35,486 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:50:35,487 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:50:35,492 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:50:35,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:35,542 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 13:50:35,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 13:50:35,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:35,595 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 13:50:35,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 13:50:35,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:35,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 13:50:35,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:35,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:50:35,735 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 13:50:35,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 239 treesize of output 238 [2022-11-23 13:50:35,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 13:50:35,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:35,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:50:35,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 30 [2022-11-23 13:50:35,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:35,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:36,030 INFO L321 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2022-11-23 13:50:36,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 124 [2022-11-23 13:50:36,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 13:50:36,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 13:50:36,319 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:50:37,208 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '391#(and (= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (< (mod |ULTIMATE.start_main_~k~0#1| 4294967296) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (= |ULTIMATE.start_main_~key~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |ULTIMATE.start_main_~#v~0#1.offset| 4))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_main_~#v~0#1.base|) (not (< |ULTIMATE.start_main_~key~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |ULTIMATE.start_main_~#v~0#1.offset|)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 13:50:37,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:50:37,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:50:37,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 21 [2022-11-23 13:50:37,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614867207] [2022-11-23 13:50:37,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:50:37,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 13:50:37,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:37,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 13:50:37,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-11-23 13:50:37,210 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:50:37,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:37,641 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-11-23 13:50:37,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 13:50:37,642 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 13:50:37,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:37,644 INFO L225 Difference]: With dead ends: 40 [2022-11-23 13:50:37,644 INFO L226 Difference]: Without dead ends: 38 [2022-11-23 13:50:37,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=217, Invalid=1189, Unknown=0, NotChecked=0, Total=1406 [2022-11-23 13:50:37,646 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 121 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:37,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 48 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:50:37,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-23 13:50:37,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 21. [2022-11-23 13:50:37,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:50:37,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-11-23 13:50:37,653 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 13 [2022-11-23 13:50:37,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:37,653 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-11-23 13:50:37,654 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:50:37,654 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-11-23 13:50:37,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 13:50:37,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:37,654 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:37,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 13:50:37,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:37,860 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:37,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:37,860 INFO L85 PathProgramCache]: Analyzing trace with hash 517429007, now seen corresponding path program 1 times [2022-11-23 13:50:37,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:37,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249751865] [2022-11-23 13:50:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:37,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:50:38,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:38,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249751865] [2022-11-23 13:50:38,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249751865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:38,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783975933] [2022-11-23 13:50:38,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:38,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:38,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:38,525 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:50:38,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 13:50:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:38,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 13:50:38,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:50:38,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-23 13:50:38,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:50:38,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 33 [2022-11-23 13:50:38,846 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:50:38,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2022-11-23 13:50:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:50:38,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:50:39,184 INFO L350 Elim1Store]: Elim1 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 71 treesize of output 63 [2022-11-23 13:50:39,201 INFO L321 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2022-11-23 13:50:39,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 321 treesize of output 295 [2022-11-23 13:50:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:50:39,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783975933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:50:39,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [679407614] [2022-11-23 13:50:39,365 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 13:50:39,366 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:50:39,366 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:50:39,366 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:50:39,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:50:39,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:39,429 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 13:50:39,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 13:50:39,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:39,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 13:50:39,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:39,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 13:50:39,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:39,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:50:39,569 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 13:50:39,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 239 treesize of output 238 [2022-11-23 13:50:39,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 13:50:39,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:39,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:50:39,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-11-23 13:50:39,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 30 [2022-11-23 13:50:39,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2022-11-23 13:50:39,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-11-23 13:50:39,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2022-11-23 13:50:39,872 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:50:40,332 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '612#(and (= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (< (mod |ULTIMATE.start_main_~k~0#1| 4294967296) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_main_~#v~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 13:50:40,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:50:40,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:50:40,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-11-23 13:50:40,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377543355] [2022-11-23 13:50:40,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:50:40,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 13:50:40,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:40,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 13:50:40,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-11-23 13:50:40,334 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:50:57,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:57,233 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2022-11-23 13:50:57,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 13:50:57,234 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-23 13:50:57,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:57,235 INFO L225 Difference]: With dead ends: 52 [2022-11-23 13:50:57,237 INFO L226 Difference]: Without dead ends: 43 [2022-11-23 13:50:57,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=213, Invalid=1268, Unknown=1, NotChecked=0, Total=1482 [2022-11-23 13:50:57,241 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 115 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:57,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 62 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:50:57,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-23 13:50:57,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 23. [2022-11-23 13:50:57,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:50:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-11-23 13:50:57,259 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 15 [2022-11-23 13:50:57,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:57,259 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-11-23 13:50:57,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:50:57,260 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-11-23 13:50:57,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 13:50:57,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:57,261 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:57,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-23 13:50:57,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:57,466 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:57,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:57,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1547777847, now seen corresponding path program 1 times [2022-11-23 13:50:57,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:57,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531972719] [2022-11-23 13:50:57,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:57,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:50:57,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:57,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531972719] [2022-11-23 13:50:57,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531972719] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:57,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999661079] [2022-11-23 13:50:57,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:57,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:57,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:57,719 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:50:57,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 13:50:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:57,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 13:50:57,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:50:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:50:57,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:50:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:50:58,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999661079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:50:58,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1818068341] [2022-11-23 13:50:58,034 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 13:50:58,035 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:50:58,035 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:50:58,035 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:50:58,035 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:50:58,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:58,085 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 13:50:58,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 13:50:58,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:58,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 13:50:58,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:58,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 13:50:58,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:58,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:58,205 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 13:50:58,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 253 treesize of output 241 [2022-11-23 13:50:58,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 13:50:58,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:58,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:50:58,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 30 [2022-11-23 13:50:58,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:58,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:50:58,390 INFO L321 Elim1Store]: treesize reduction 112, result has 7.4 percent of original size [2022-11-23 13:50:58,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 113 [2022-11-23 13:50:58,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 13:50:58,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 13:50:58,596 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:50:59,203 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '856#(and (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (< (mod |ULTIMATE.start_main_~k~0#1| 4294967296) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_main_~#v~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 13:50:59,203 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:50:59,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:50:59,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-11-23 13:50:59,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418131788] [2022-11-23 13:50:59,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:50:59,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 13:50:59,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:59,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 13:50:59,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-11-23 13:50:59,206 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:50:59,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:59,448 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-11-23 13:50:59,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 13:50:59,449 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-23 13:50:59,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:59,450 INFO L225 Difference]: With dead ends: 45 [2022-11-23 13:50:59,450 INFO L226 Difference]: Without dead ends: 25 [2022-11-23 13:50:59,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-11-23 13:50:59,451 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:59,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 43 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:50:59,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-23 13:50:59,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-11-23 13:50:59,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:50:59,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-11-23 13:50:59,459 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2022-11-23 13:50:59,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:59,460 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-11-23 13:50:59,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:50:59,460 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-11-23 13:50:59,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 13:50:59,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:59,461 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:59,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 13:50:59,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 13:50:59,667 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:59,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:59,667 INFO L85 PathProgramCache]: Analyzing trace with hash 937025065, now seen corresponding path program 3 times [2022-11-23 13:50:59,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:59,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156704777] [2022-11-23 13:50:59,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:59,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:51:00,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:00,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156704777] [2022-11-23 13:51:00,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156704777] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:51:00,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433665058] [2022-11-23 13:51:00,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 13:51:00,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:00,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:51:00,813 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:51:00,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 13:51:00,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 13:51:00,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:51:00,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 13:51:00,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:01,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-23 13:51:01,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:51:01,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:51:01,223 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:51:01,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-11-23 13:51:01,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:51:01,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-23 13:51:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:51:01,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:51:01,639 INFO L350 Elim1Store]: Elim1 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 73 treesize of output 67 [2022-11-23 13:51:01,662 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:51:01,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1357 treesize of output 1275 [2022-11-23 13:51:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:51:06,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433665058] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:51:06,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1747552752] [2022-11-23 13:51:06,854 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 13:51:06,854 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:51:06,854 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:51:06,855 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:51:06,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:51:06,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:51:06,905 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 13:51:06,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 13:51:06,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:51:06,956 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 13:51:06,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 13:51:07,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:51:07,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 13:51:07,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:51:07,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:51:07,342 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 13:51:07,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 239 treesize of output 238 [2022-11-23 13:51:07,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 13:51:07,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:51:07,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:51:07,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-11-23 13:51:07,569 INFO L321 Elim1Store]: treesize reduction 162, result has 9.0 percent of original size [2022-11-23 13:51:07,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 116 [2022-11-23 13:51:07,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 13:51:07,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 13:51:07,709 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:51:08,334 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1105#(and (= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (< (mod |ULTIMATE.start_main_~k~0#1| 4294967296) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_main_~#v~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 13:51:08,334 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:51:08,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:51:08,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 26 [2022-11-23 13:51:08,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777459521] [2022-11-23 13:51:08,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:51:08,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 13:51:08,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:51:08,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 13:51:08,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 13:51:08,336 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:51:14,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:14,528 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-11-23 13:51:14,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 13:51:14,528 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-23 13:51:14,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:14,529 INFO L225 Difference]: With dead ends: 82 [2022-11-23 13:51:14,529 INFO L226 Difference]: Without dead ends: 80 [2022-11-23 13:51:14,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=497, Invalid=2695, Unknown=0, NotChecked=0, Total=3192 [2022-11-23 13:51:14,532 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 241 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:14,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 123 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 13:51:14,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-23 13:51:14,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 32. [2022-11-23 13:51:14,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:51:14,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-11-23 13:51:14,545 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 18 [2022-11-23 13:51:14,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:14,545 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-11-23 13:51:14,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:51:14,545 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-11-23 13:51:14,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 13:51:14,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:14,546 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:14,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 13:51:14,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:14,747 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:51:14,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:14,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1290856228, now seen corresponding path program 2 times [2022-11-23 13:51:14,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:51:14,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284567] [2022-11-23 13:51:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:14,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:51:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:51:15,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:15,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284567] [2022-11-23 13:51:15,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284567] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:51:15,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620306663] [2022-11-23 13:51:15,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:51:15,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:15,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:51:15,839 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:51:15,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 13:51:16,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 13:51:16,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:51:16,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 13:51:16,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:16,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-11-23 13:51:16,359 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:51:16,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 33 [2022-11-23 13:51:16,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:51:16,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:51:16,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:51:16,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-11-23 13:51:16,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:51:16,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:51:16,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:51:16,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:51:16,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2022-11-23 13:51:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:51:16,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:51:24,085 INFO L350 Elim1Store]: Elim1 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 87 treesize of output 79 [2022-11-23 13:51:24,118 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:51:24,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 10647 treesize of output 10271 [2022-11-23 13:55:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:55:04,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620306663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:55:04,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [454618613] [2022-11-23 13:55:04,373 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 13:55:04,374 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:55:04,374 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:55:04,374 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:55:04,375 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:55:04,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:04,462 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 13:55:04,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 13:55:04,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:04,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 13:55:04,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:04,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 13:55:04,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:04,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:04,624 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 13:55:04,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 253 treesize of output 241 [2022-11-23 13:55:04,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 13:55:04,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-11-23 13:55:04,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:04,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:55:04,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 30 [2022-11-23 13:55:04,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2022-11-23 13:55:04,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-11-23 13:55:04,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2022-11-23 13:55:04,931 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:55:05,686 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1474#(and (= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (< (mod |ULTIMATE.start_main_~k~0#1| 4294967296) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_main_~#v~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 13:55:05,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:55:05,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:55:05,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 29 [2022-11-23 13:55:05,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888186455] [2022-11-23 13:55:05,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:55:05,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-23 13:55:05,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:55:05,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-23 13:55:05,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1164, Unknown=1, NotChecked=0, Total=1332 [2022-11-23 13:55:05,696 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:55:16,653 WARN L233 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 58 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:55:21,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-23 13:55:29,271 WARN L233 SmtUtils]: Spent 8.12s on a formula simplification. DAG size of input: 45 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:55:41,006 WARN L233 SmtUtils]: Spent 6.46s on a formula simplification. DAG size of input: 62 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:55:45,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 13:55:47,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 13:55:49,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 13:55:51,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 13:55:53,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 13:55:55,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 13:56:17,063 WARN L233 SmtUtils]: Spent 16.96s on a formula simplification. DAG size of input: 51 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:56:21,549 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (* |c_ULTIMATE.start_main_~i~0#1| 4)) (.cse1 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 4)) (.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#v~0#1.base|))) (and (forall ((v_ArrVal_137 Int) (v_ArrVal_136 Int) (|v_ULTIMATE.start_main_~i~0#1_54| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_54| |c_ULTIMATE.start_main_~j~0#1|) (let ((.cse0 (store (store .cse2 (+ .cse3 |c_ULTIMATE.start_main_~#v~0#1.offset| 4) v_ArrVal_136) (+ (* |v_ULTIMATE.start_main_~i~0#1_54| 4) |c_ULTIMATE.start_main_~#v~0#1.offset| 4) v_ArrVal_137))) (< (select .cse0 |c_ULTIMATE.start_main_~#v~0#1.offset|) (+ (select .cse0 .cse1) 1))) (not (<= v_ArrVal_136 |c_ULTIMATE.start_main_~key~0#1|)))) (or (not (<= 0 |c_ULTIMATE.start_main_~i~0#1|)) (and (= .cse3 0) (< 0 |c_ULTIMATE.start_main_~j~0#1|))) (let ((.cse4 (* 4 |c_ULTIMATE.start_main_~k~0#1|))) (<= (select .cse2 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| (- 4) .cse4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| .cse4)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_54| Int)) (or (forall ((v_ArrVal_137 Int)) (let ((.cse5 (store .cse2 (+ (* |v_ULTIMATE.start_main_~i~0#1_54| 4) |c_ULTIMATE.start_main_~#v~0#1.offset| 4) v_ArrVal_137))) (< (select .cse5 |c_ULTIMATE.start_main_~#v~0#1.offset|) (+ (select .cse5 .cse1) 1)))) (not (<= |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~i~0#1_54| 1))))) (= |c_ULTIMATE.start_main_~k~0#1| 1) (= |c_ULTIMATE.start_main_~#v~0#1.offset| 0))) is different from false [2022-11-23 13:56:43,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 13:56:53,907 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 53 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:57:12,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:12,433 INFO L93 Difference]: Finished difference Result 124 states and 151 transitions. [2022-11-23 13:57:12,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-23 13:57:12,434 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-23 13:57:12,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:12,435 INFO L225 Difference]: With dead ends: 124 [2022-11-23 13:57:12,435 INFO L226 Difference]: Without dead ends: 122 [2022-11-23 13:57:12,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 117.1s TimeCoverageRelationStatistics Valid=752, Invalid=4790, Unknown=12, NotChecked=146, Total=5700 [2022-11-23 13:57:12,438 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 235 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 51 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:12,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 137 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 725 Invalid, 7 Unknown, 1 Unchecked, 17.9s Time] [2022-11-23 13:57:12,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-23 13:57:12,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 36. [2022-11-23 13:57:12,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:12,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-11-23 13:57:12,461 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 20 [2022-11-23 13:57:12,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:12,462 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-11-23 13:57:12,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:12,462 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-11-23 13:57:12,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 13:57:12,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:12,463 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:12,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 13:57:12,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:57:12,664 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:57:12,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:12,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1926418580, now seen corresponding path program 2 times [2022-11-23 13:57:12,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:57:12,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422833781] [2022-11-23 13:57:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:12,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:57:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:57:14,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:57:14,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422833781] [2022-11-23 13:57:14,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422833781] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:57:14,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649576101] [2022-11-23 13:57:14,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:57:14,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:57:14,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:57:14,017 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:57:14,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 13:57:14,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 13:57:14,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:57:14,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 13:57:14,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:57:14,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 13:57:14,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:57:14,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-23 13:57:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:57:14,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:57:17,309 INFO L350 Elim1Store]: Elim1 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 57 treesize of output 51 [2022-11-23 13:57:17,345 INFO L321 Elim1Store]: treesize reduction 5, result has 76.2 percent of original size [2022-11-23 13:57:17,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 82 [2022-11-23 13:57:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:57:17,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649576101] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:57:17,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [383103591] [2022-11-23 13:57:17,423 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 13:57:17,424 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:57:17,424 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:57:17,424 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:57:17,424 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:57:17,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:57:17,492 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 13:57:17,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 13:57:17,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:57:17,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 13:57:17,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:57:17,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 13:57:17,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:57:17,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:57:17,619 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 13:57:17,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 253 treesize of output 241 [2022-11-23 13:57:17,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 13:57:17,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:57:17,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:57:17,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 30 [2022-11-23 13:57:17,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:57:17,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:57:17,869 INFO L321 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2022-11-23 13:57:17,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 124 [2022-11-23 13:57:18,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 13:57:18,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 13:57:18,129 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:57:19,344 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1948#(and (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (< (mod |ULTIMATE.start_main_~k~0#1| 4294967296) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_main_~#v~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 13:57:19,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:57:19,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:57:19,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 26 [2022-11-23 13:57:19,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815283600] [2022-11-23 13:57:19,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:57:19,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 13:57:19,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:19,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 13:57:19,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1124, Unknown=1, NotChecked=0, Total=1260 [2022-11-23 13:57:19,347 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:20,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:20,424 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2022-11-23 13:57:20,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 13:57:20,424 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-23 13:57:20,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:20,425 INFO L225 Difference]: With dead ends: 63 [2022-11-23 13:57:20,426 INFO L226 Difference]: Without dead ends: 61 [2022-11-23 13:57:20,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=307, Invalid=2142, Unknown=1, NotChecked=0, Total=2450 [2022-11-23 13:57:20,428 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 142 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:20,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 88 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:57:20,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-23 13:57:20,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 43. [2022-11-23 13:57:20,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 42 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:20,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2022-11-23 13:57:20,458 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 21 [2022-11-23 13:57:20,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:20,459 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2022-11-23 13:57:20,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:20,459 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2022-11-23 13:57:20,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 13:57:20,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:20,460 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:20,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 13:57:20,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:57:20,661 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:57:20,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:20,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1913020447, now seen corresponding path program 3 times [2022-11-23 13:57:20,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:57:20,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610010392] [2022-11-23 13:57:20,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:20,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:57:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:57:21,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:57:21,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610010392] [2022-11-23 13:57:21,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610010392] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:57:21,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294265607] [2022-11-23 13:57:21,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 13:57:21,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:57:21,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:57:21,680 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:57:21,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 13:57:21,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 13:57:21,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:57:21,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-23 13:57:21,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:57:22,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 13:57:22,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 13:57:22,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:57:22,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 13:57:22,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:57:22,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-23 13:57:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:57:22,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:57:23,030 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 76 [2022-11-23 13:57:23,098 INFO L321 Elim1Store]: treesize reduction 5, result has 76.2 percent of original size [2022-11-23 13:57:23,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 5000 treesize of output 4816 [2022-11-23 13:57:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 13:57:33,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294265607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:57:33,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1283380410] [2022-11-23 13:57:33,825 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 13:57:33,826 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:57:33,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:57:33,826 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:57:33,827 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:57:33,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:57:33,899 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 13:57:33,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 13:57:33,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:57:33,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 13:57:33,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:57:33,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 13:57:34,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:57:34,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:57:34,062 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 13:57:34,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 253 treesize of output 241 [2022-11-23 13:57:34,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 13:57:34,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:57:34,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:57:34,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 30 [2022-11-23 13:57:34,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:57:34,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:57:34,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 30 [2022-11-23 13:57:34,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2022-11-23 13:57:34,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-11-23 13:57:34,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2022-11-23 13:57:34,322 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:57:35,124 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2297#(and (= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (< (mod |ULTIMATE.start_main_~k~0#1| 4294967296) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_main_~#v~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 13:57:35,125 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:57:35,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:57:35,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 11] total 25 [2022-11-23 13:57:35,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773322727] [2022-11-23 13:57:35,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:57:35,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 13:57:35,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:35,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 13:57:35,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 13:57:35,127 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:38,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 13:57:40,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 13:57:45,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 13:57:47,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 13:57:49,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 13:57:55,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:55,432 INFO L93 Difference]: Finished difference Result 115 states and 140 transitions. [2022-11-23 13:57:55,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-23 13:57:55,433 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-23 13:57:55,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:55,434 INFO L225 Difference]: With dead ends: 115 [2022-11-23 13:57:55,434 INFO L226 Difference]: Without dead ends: 113 [2022-11-23 13:57:55,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=565, Invalid=3593, Unknown=2, NotChecked=0, Total=4160 [2022-11-23 13:57:55,437 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 269 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 62 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:55,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 94 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 413 Invalid, 5 Unknown, 0 Unchecked, 11.2s Time] [2022-11-23 13:57:55,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-23 13:57:55,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 59. [2022-11-23 13:57:55,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:55,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2022-11-23 13:57:55,475 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 22 [2022-11-23 13:57:55,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:55,475 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2022-11-23 13:57:55,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:55,476 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2022-11-23 13:57:55,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 13:57:55,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:55,477 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:55,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-23 13:57:55,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 13:57:55,678 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:57:55,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:55,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1608263417, now seen corresponding path program 1 times [2022-11-23 13:57:55,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:57:55,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463165745] [2022-11-23 13:57:55,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:55,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:57:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:57:56,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:57:56,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463165745] [2022-11-23 13:57:56,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463165745] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:57:56,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684926721] [2022-11-23 13:57:56,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:56,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:57:56,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:57:56,898 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:57:56,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 13:57:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:57,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-23 13:57:57,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:57:57,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2022-11-23 13:57:57,448 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:57:57,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2022-11-23 13:57:57,738 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:57:57,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2022-11-23 13:57:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:57:57,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:58:02,916 INFO L350 Elim1Store]: Elim1 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 73 treesize of output 65 [2022-11-23 13:58:02,945 INFO L321 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2022-11-23 13:58:02,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 313 treesize of output 279 [2022-11-23 13:58:03,277 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:58:03,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684926721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:58:03,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1527823335] [2022-11-23 13:58:03,280 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 13:58:03,280 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:58:03,281 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:58:03,281 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:58:03,281 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:58:03,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:03,353 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 13:58:03,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 13:58:03,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:03,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 13:58:03,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:03,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 13:58:03,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:03,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:58:03,517 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 13:58:03,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 239 treesize of output 238 [2022-11-23 13:58:03,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 13:58:03,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:03,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:58:03,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 30 [2022-11-23 13:58:03,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:03,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:58:03,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 30 [2022-11-23 13:58:03,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2022-11-23 13:58:03,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-11-23 13:58:03,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2022-11-23 13:58:03,891 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:58:05,012 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2797#(and (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (< (mod |ULTIMATE.start_main_~k~0#1| 4294967296) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_main_~#v~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 13:58:05,012 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:58:05,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:58:05,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 34 [2022-11-23 13:58:05,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721554696] [2022-11-23 13:58:05,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:58:05,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-23 13:58:05,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:58:05,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-23 13:58:05,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1632, Unknown=0, NotChecked=0, Total=1806 [2022-11-23 13:58:05,016 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:58:10,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 13:58:32,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:32,283 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2022-11-23 13:58:32,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-23 13:58:32,284 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-23 13:58:32,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:32,285 INFO L225 Difference]: With dead ends: 116 [2022-11-23 13:58:32,285 INFO L226 Difference]: Without dead ends: 114 [2022-11-23 13:58:32,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=561, Invalid=5131, Unknown=8, NotChecked=0, Total=5700 [2022-11-23 13:58:32,288 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 211 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:32,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 121 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 596 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2022-11-23 13:58:32,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-23 13:58:32,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 61. [2022-11-23 13:58:32,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.35) internal successors, (81), 60 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:58:32,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2022-11-23 13:58:32,330 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 23 [2022-11-23 13:58:32,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:32,331 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2022-11-23 13:58:32,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:58:32,331 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2022-11-23 13:58:32,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 13:58:32,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:32,332 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 13:58:32,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 13:58:32,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:58:32,540 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:58:32,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:32,540 INFO L85 PathProgramCache]: Analyzing trace with hash 588071497, now seen corresponding path program 3 times [2022-11-23 13:58:32,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:32,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442192053] [2022-11-23 13:58:32,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:32,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:58:33,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:33,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442192053] [2022-11-23 13:58:33,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442192053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:58:33,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045809256] [2022-11-23 13:58:33,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 13:58:33,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:58:33,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:58:33,111 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:58:33,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 13:58:33,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 13:58:33,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:58:33,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 13:58:33,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:58:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:58:33,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:58:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:58:33,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045809256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:58:33,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [452787769] [2022-11-23 13:58:33,885 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 13:58:33,885 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:58:33,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:58:33,886 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:58:33,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:58:33,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:33,974 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 13:58:33,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 13:58:33,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:34,054 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 13:58:34,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 13:58:34,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:34,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 13:58:34,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:34,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:58:34,233 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 13:58:34,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 239 treesize of output 238 [2022-11-23 13:58:34,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 13:58:34,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:34,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:58:34,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 30 [2022-11-23 13:58:34,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:34,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:34,519 INFO L321 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2022-11-23 13:58:34,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 124 [2022-11-23 13:58:34,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 13:58:34,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 13:58:34,836 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:58:36,254 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3297#(and (< (mod |ULTIMATE.start_main_~k~0#1| 4294967296) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem13#1|) (<= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#v~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#v~0#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 13:58:36,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:58:36,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:58:36,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-11-23 13:58:36,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234271894] [2022-11-23 13:58:36,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:58:36,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 13:58:36,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:58:36,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 13:58:36,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2022-11-23 13:58:36,257 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:58:37,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:37,022 INFO L93 Difference]: Finished difference Result 135 states and 179 transitions. [2022-11-23 13:58:37,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 13:58:37,023 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-23 13:58:37,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:37,024 INFO L225 Difference]: With dead ends: 135 [2022-11-23 13:58:37,025 INFO L226 Difference]: Without dead ends: 99 [2022-11-23 13:58:37,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2022-11-23 13:58:37,026 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 73 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:37,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 80 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 13:58:37,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-23 13:58:37,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2022-11-23 13:58:37,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 84 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:58:37,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2022-11-23 13:58:37,098 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 24 [2022-11-23 13:58:37,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:37,098 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2022-11-23 13:58:37,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:58:37,099 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2022-11-23 13:58:37,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 13:58:37,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:37,100 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:58:37,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 13:58:37,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:58:37,307 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:58:37,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:37,308 INFO L85 PathProgramCache]: Analyzing trace with hash 803829790, now seen corresponding path program 2 times [2022-11-23 13:58:37,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:37,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108125683] [2022-11-23 13:58:37,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:37,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:58:39,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:39,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108125683] [2022-11-23 13:58:39,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108125683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:58:39,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879668487] [2022-11-23 13:58:39,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:58:39,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:58:39,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:58:39,491 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:58:39,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 13:58:39,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 13:58:39,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:58:39,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-23 13:58:39,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:58:39,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 13:58:39,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:39,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 13:58:40,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:40,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:40,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:58:40,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:40,124 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-23 13:58:40,125 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 42 treesize of output 47 [2022-11-23 13:58:40,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:40,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:40,257 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:58:40,258 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 49 treesize of output 35 [2022-11-23 13:58:40,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:40,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:40,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:58:40,387 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 38 treesize of output 32 [2022-11-23 13:58:40,599 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:58:40,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-23 13:58:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:58:40,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:58:55,808 WARN L233 SmtUtils]: Spent 10.26s on a formula simplification. DAG size of input: 59 DAG size of output: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:59:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 2 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:59:21,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879668487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:59:21,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [706787594] [2022-11-23 13:59:21,190 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 13:59:21,190 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:59:21,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:59:21,191 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:59:21,191 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:59:21,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:59:21,260 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 13:59:21,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 13:59:21,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:59:21,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 13:59:21,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:59:21,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 13:59:21,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:59:21,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:59:21,403 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 13:59:21,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 239 treesize of output 238 [2022-11-23 13:59:21,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 13:59:21,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:59:21,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:59:21,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-11-23 13:59:21,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 30 [2022-11-23 13:59:21,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2022-11-23 13:59:21,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-11-23 13:59:21,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2022-11-23 13:59:21,736 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:59:22,819 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3835#(and (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (< (mod |ULTIMATE.start_main_~k~0#1| 4294967296) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_main_~#v~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 13:59:22,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:59:22,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:59:22,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 15] total 38 [2022-11-23 13:59:22,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513775869] [2022-11-23 13:59:22,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:59:22,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-23 13:59:22,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:59:22,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-23 13:59:22,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1932, Unknown=11, NotChecked=0, Total=2162 [2022-11-23 13:59:22,822 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand has 38 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 38 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:59:25,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:59:25,249 INFO L93 Difference]: Finished difference Result 144 states and 178 transitions. [2022-11-23 13:59:25,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-23 13:59:25,249 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 38 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-23 13:59:25,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:59:25,250 INFO L225 Difference]: With dead ends: 144 [2022-11-23 13:59:25,250 INFO L226 Difference]: Without dead ends: 95 [2022-11-23 13:59:25,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 43.2s TimeCoverageRelationStatistics Valid=408, Invalid=3363, Unknown=11, NotChecked=0, Total=3782 [2022-11-23 13:59:25,253 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 101 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:59:25,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 86 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 13:59:25,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-23 13:59:25,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2022-11-23 13:59:25,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.255813953488372) internal successors, (108), 86 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:59:25,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2022-11-23 13:59:25,319 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 25 [2022-11-23 13:59:25,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:59:25,319 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2022-11-23 13:59:25,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 38 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:59:25,320 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2022-11-23 13:59:25,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 13:59:25,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:59:25,321 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:59:25,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 13:59:25,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 13:59:25,527 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:59:25,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:59:25,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1497688493, now seen corresponding path program 4 times [2022-11-23 13:59:25,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:59:25,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085540431] [2022-11-23 13:59:25,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:59:25,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:59:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:59:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:59:26,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:59:26,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085540431] [2022-11-23 13:59:26,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085540431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:59:26,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91934882] [2022-11-23 13:59:26,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 13:59:26,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:59:26,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:59:26,808 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:59:26,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 13:59:26,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:59:26,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-23 13:59:26,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:59:27,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 13:59:27,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:59:27,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:59:27,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:59:27,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-23 13:59:27,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:59:27,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-23 13:59:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:59:27,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:59:54,966 INFO L350 Elim1Store]: Elim1 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 73 treesize of output 67 [2022-11-23 13:59:54,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:59:54,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 293 treesize of output 275 [2022-11-23 13:59:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 14 refuted. 3 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 13:59:55,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91934882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:59:55,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [190764088] [2022-11-23 13:59:55,407 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 13:59:55,407 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:59:55,407 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:59:55,407 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:59:55,408 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:59:55,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:59:55,466 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 13:59:55,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 13:59:55,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:59:55,523 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 13:59:55,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 13:59:55,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:59:55,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 13:59:55,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:59:55,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:59:55,631 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 13:59:55,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 239 treesize of output 238 [2022-11-23 13:59:55,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 13:59:55,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:59:55,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:59:55,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 30 [2022-11-23 13:59:55,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:59:55,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:59:55,838 INFO L321 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2022-11-23 13:59:55,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 124 [2022-11-23 13:59:55,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 13:59:55,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 13:59:56,059 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:59:57,160 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4409#(and (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (< (mod |ULTIMATE.start_main_~k~0#1| 4294967296) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_main_~#v~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#v~0#1.offset|)) |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 13:59:57,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:59:57,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:59:57,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 13] total 33 [2022-11-23 13:59:57,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066180195] [2022-11-23 13:59:57,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:59:57,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-23 13:59:57,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:59:57,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-23 13:59:57,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1621, Unknown=11, NotChecked=0, Total=1806 [2022-11-23 13:59:57,163 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:00:00,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:00:00,908 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2022-11-23 14:00:00,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 14:00:00,908 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-23 14:00:00,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:00:00,909 INFO L225 Difference]: With dead ends: 118 [2022-11-23 14:00:00,909 INFO L226 Difference]: Without dead ends: 116 [2022-11-23 14:00:00,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=331, Invalid=2520, Unknown=11, NotChecked=0, Total=2862 [2022-11-23 14:00:00,911 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 115 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:00:00,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 144 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:00:00,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-23 14:00:00,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 100. [2022-11-23 14:00:00,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.2525252525252526) internal successors, (124), 99 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:00:00,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2022-11-23 14:00:00,978 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 26 [2022-11-23 14:00:00,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:00:00,978 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2022-11-23 14:00:00,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:00:00,979 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2022-11-23 14:00:00,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-23 14:00:00,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:00:00,980 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:00:00,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 14:00:01,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 14:00:01,191 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:00:01,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:00:01,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1713401539, now seen corresponding path program 3 times [2022-11-23 14:00:01,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:00:01,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064817820] [2022-11-23 14:00:01,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:00:01,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:00:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:00:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:00:03,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:00:03,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064817820] [2022-11-23 14:00:03,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064817820] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:00:03,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97051699] [2022-11-23 14:00:03,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:00:03,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:00:03,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:00:03,043 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:00:03,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7ca127-c071-40a4-897b-638fc8420e10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 14:00:03,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:00:03,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:00:03,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-23 14:00:03,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:00:03,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-23 14:00:03,555 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:00:03,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 33 [2022-11-23 14:00:03,796 INFO L321 Elim1Store]: treesize reduction 70, result has 38.1 percent of original size [2022-11-23 14:00:03,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 75 [2022-11-23 14:00:04,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:00:04,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:00:04,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:00:04,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:00:04,260 INFO L321 Elim1Store]: treesize reduction 4, result has 42.9 percent of original size [2022-11-23 14:00:04,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 75 [2022-11-23 14:00:04,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:00:04,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:00:04,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:00:04,474 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:00:04,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 65 [2022-11-23 14:00:05,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:00:05,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:00:05,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:00:05,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:00:05,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:00:05,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 23 [2022-11-23 14:00:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:00:05,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:00:15,473 INFO L350 Elim1Store]: Elim1 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 403 treesize of output 375 [2022-11-23 14:00:17,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:00:17,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 51939229363 treesize of output 48650776403