./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0234-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0234-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3248e88e6fd49fdcf0a9f78f1aa9e69276951d353f75f39f6bb30d51b2e53989 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:45:31,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:45:31,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:45:31,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:45:31,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:45:31,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:45:31,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:45:31,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:45:31,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:45:31,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:45:31,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:45:31,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:45:31,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:45:31,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:45:31,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:45:31,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:45:31,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:45:31,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:45:31,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:45:31,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:45:31,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:45:31,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:45:31,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:45:31,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:45:31,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:45:31,778 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:45:31,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:45:31,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:45:31,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:45:31,781 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:45:31,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:45:31,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:45:31,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:45:31,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:45:31,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:45:31,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:45:31,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:45:31,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:45:31,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:45:31,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:45:31,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:45:31,791 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-20 22:45:31,817 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:45:31,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:45:31,818 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:45:31,818 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:45:31,819 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:45:31,819 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:45:31,819 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:45:31,820 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:45:31,820 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:45:31,820 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:45:31,820 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:45:31,821 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:45:31,821 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:45:31,821 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:45:31,821 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:45:31,822 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:45:31,822 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:45:31,822 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:45:31,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 22:45:31,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 22:45:31,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:45:31,824 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:45:31,824 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 22:45:31,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:45:31,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:45:31,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:45:31,825 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 22:45:31,825 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 22:45:31,825 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 22:45:31,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:45:31,826 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 22:45:31,826 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:45:31,826 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:45:31,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:45:31,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:45:31,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:45:31,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:45:31,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:45:31,828 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:45:31,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:45:31,828 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:45:31,829 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:45:31,829 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3248e88e6fd49fdcf0a9f78f1aa9e69276951d353f75f39f6bb30d51b2e53989 [2021-11-20 22:45:32,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:45:32,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:45:32,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:45:32,121 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:45:32,122 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:45:32,123 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/memsafety/test-0234-2.i [2021-11-20 22:45:32,213 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/data/112578bbc/4ecf87b2e0f04baba7665d61b2ec0a23/FLAG3e9d9f31f [2021-11-20 22:45:32,787 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:45:32,788 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/sv-benchmarks/c/memsafety/test-0234-2.i [2021-11-20 22:45:32,812 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/data/112578bbc/4ecf87b2e0f04baba7665d61b2ec0a23/FLAG3e9d9f31f [2021-11-20 22:45:33,070 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/data/112578bbc/4ecf87b2e0f04baba7665d61b2ec0a23 [2021-11-20 22:45:33,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:45:33,076 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:45:33,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:45:33,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:45:33,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:45:33,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:45:33" (1/1) ... [2021-11-20 22:45:33,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43d2a3c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:33, skipping insertion in model container [2021-11-20 22:45:33,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:45:33" (1/1) ... [2021-11-20 22:45:33,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:45:33,136 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:45:33,592 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:45:33,604 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:45:33,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:45:33,729 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:45:33,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:33 WrapperNode [2021-11-20 22:45:33,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:45:33,731 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:45:33,731 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:45:33,731 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:45:33,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:33" (1/1) ... [2021-11-20 22:45:33,762 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:33" (1/1) ... [2021-11-20 22:45:33,815 INFO L137 Inliner]: procedures = 188, calls = 58, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 197 [2021-11-20 22:45:33,816 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:45:33,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:45:33,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:45:33,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:45:33,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:33" (1/1) ... [2021-11-20 22:45:33,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:33" (1/1) ... [2021-11-20 22:45:33,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:33" (1/1) ... [2021-11-20 22:45:33,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:33" (1/1) ... [2021-11-20 22:45:33,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:33" (1/1) ... [2021-11-20 22:45:33,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:33" (1/1) ... [2021-11-20 22:45:33,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:33" (1/1) ... [2021-11-20 22:45:33,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:45:33,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:45:33,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:45:33,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:45:33,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:33" (1/1) ... [2021-11-20 22:45:33,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:45:33,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:45:33,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:45:33,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:45:33,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 22:45:33,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:45:33,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 22:45:33,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 22:45:33,965 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2021-11-20 22:45:33,965 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2021-11-20 22:45:33,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 22:45:33,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 22:45:33,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 22:45:33,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:45:33,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:45:34,141 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:45:34,142 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:45:34,591 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:45:34,716 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:45:34,716 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-20 22:45:34,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:45:34 BoogieIcfgContainer [2021-11-20 22:45:34,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:45:34,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:45:34,733 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:45:34,736 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:45:34,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:45:33" (1/3) ... [2021-11-20 22:45:34,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebc1fae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:45:34, skipping insertion in model container [2021-11-20 22:45:34,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:33" (2/3) ... [2021-11-20 22:45:34,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebc1fae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:45:34, skipping insertion in model container [2021-11-20 22:45:34,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:45:34" (3/3) ... [2021-11-20 22:45:34,740 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0234-2.i [2021-11-20 22:45:34,746 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:45:34,746 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 70 error locations. [2021-11-20 22:45:34,817 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:45:34,824 INFO L339 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 22:45:34,824 INFO L340 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2021-11-20 22:45:34,842 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 72 states have (on average 2.263888888888889) internal successors, (163), 142 states have internal predecessors, (163), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 22:45:34,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-20 22:45:34,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:45:34,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-20 22:45:34,851 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:45:34,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:45:34,856 INFO L85 PathProgramCache]: Analyzing trace with hash 343908, now seen corresponding path program 1 times [2021-11-20 22:45:34,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:45:34,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61338836] [2021-11-20 22:45:34,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:45:34,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:45:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:45:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:45:35,007 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:45:35,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61338836] [2021-11-20 22:45:35,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61338836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:45:35,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:45:35,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:45:35,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475506178] [2021-11-20 22:45:35,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:45:35,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 22:45:35,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:45:35,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 22:45:35,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 22:45:35,055 INFO L87 Difference]: Start difference. First operand has 150 states, 72 states have (on average 2.263888888888889) internal successors, (163), 142 states have internal predecessors, (163), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:45:35,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:45:35,129 INFO L93 Difference]: Finished difference Result 150 states and 165 transitions. [2021-11-20 22:45:35,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 22:45:35,132 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-11-20 22:45:35,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:45:35,141 INFO L225 Difference]: With dead ends: 150 [2021-11-20 22:45:35,141 INFO L226 Difference]: Without dead ends: 149 [2021-11-20 22:45:35,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 22:45:35,146 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:45:35,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 141 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:45:35,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-20 22:45:35,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-11-20 22:45:35,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 72 states have (on average 2.111111111111111) internal successors, (152), 141 states have internal predecessors, (152), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 22:45:35,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 164 transitions. [2021-11-20 22:45:35,224 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 164 transitions. Word has length 3 [2021-11-20 22:45:35,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:45:35,225 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 164 transitions. [2021-11-20 22:45:35,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:45:35,226 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 164 transitions. [2021-11-20 22:45:35,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 22:45:35,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:45:35,227 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 22:45:35,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 22:45:35,227 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:45:35,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:45:35,231 INFO L85 PathProgramCache]: Analyzing trace with hash 326485871, now seen corresponding path program 1 times [2021-11-20 22:45:35,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:45:35,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603256979] [2021-11-20 22:45:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:45:35,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:45:35,264 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:45:35,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111830135] [2021-11-20 22:45:35,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:45:35,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:45:35,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:45:35,267 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:45:35,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 22:45:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:45:35,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:45:35,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:45:35,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-20 22:45:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:45:35,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:45:35,471 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:45:35,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603256979] [2021-11-20 22:45:35,473 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:45:35,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111830135] [2021-11-20 22:45:35,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111830135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:45:35,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:45:35,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:45:35,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424153435] [2021-11-20 22:45:35,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:45:35,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:45:35,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:45:35,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:45:35,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:45:35,487 INFO L87 Difference]: Start difference. First operand 149 states and 164 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:45:35,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:45:35,683 INFO L93 Difference]: Finished difference Result 148 states and 163 transitions. [2021-11-20 22:45:35,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:45:35,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-20 22:45:35,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:45:35,686 INFO L225 Difference]: With dead ends: 148 [2021-11-20 22:45:35,686 INFO L226 Difference]: Without dead ends: 148 [2021-11-20 22:45:35,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:45:35,688 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 5 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:45:35,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 223 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:45:35,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-20 22:45:35,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-11-20 22:45:35,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 140 states have internal predecessors, (151), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 22:45:35,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 163 transitions. [2021-11-20 22:45:35,702 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 163 transitions. Word has length 5 [2021-11-20 22:45:35,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:45:35,702 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 163 transitions. [2021-11-20 22:45:35,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:45:35,702 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 163 transitions. [2021-11-20 22:45:35,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 22:45:35,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:45:35,703 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 22:45:35,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 22:45:35,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:45:35,927 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:45:35,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:45:35,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1531127730, now seen corresponding path program 1 times [2021-11-20 22:45:35,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:45:35,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836614038] [2021-11-20 22:45:35,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:45:35,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:45:35,942 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:45:35,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785361003] [2021-11-20 22:45:35,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:45:35,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:45:35,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:45:35,947 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:45:35,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 22:45:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:45:36,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 22:45:36,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:45:36,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 14 treesize of output 13 [2021-11-20 22:45:36,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:45:36,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:45:36,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:45:36,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836614038] [2021-11-20 22:45:36,323 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:45:36,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785361003] [2021-11-20 22:45:36,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785361003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:45:36,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:45:36,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:45:36,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814160375] [2021-11-20 22:45:36,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:45:36,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:45:36,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:45:36,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:45:36,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:45:36,326 INFO L87 Difference]: Start difference. First operand 148 states and 163 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:45:36,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:45:36,391 INFO L93 Difference]: Finished difference Result 147 states and 162 transitions. [2021-11-20 22:45:36,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:45:36,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 22:45:36,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:45:36,393 INFO L225 Difference]: With dead ends: 147 [2021-11-20 22:45:36,393 INFO L226 Difference]: Without dead ends: 147 [2021-11-20 22:45:36,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:45:36,395 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 0 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:45:36,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 241 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2021-11-20 22:45:36,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-20 22:45:36,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-11-20 22:45:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 139 states have internal predecessors, (150), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 22:45:36,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 162 transitions. [2021-11-20 22:45:36,408 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 162 transitions. Word has length 6 [2021-11-20 22:45:36,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:45:36,408 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 162 transitions. [2021-11-20 22:45:36,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:45:36,409 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 162 transitions. [2021-11-20 22:45:36,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 22:45:36,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:45:36,411 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:45:36,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 22:45:36,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:45:36,632 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:45:36,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:45:36,633 INFO L85 PathProgramCache]: Analyzing trace with hash -147063100, now seen corresponding path program 1 times [2021-11-20 22:45:36,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:45:36,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056811817] [2021-11-20 22:45:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:45:36,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:45:36,656 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:45:36,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125350247] [2021-11-20 22:45:36,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:45:36,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:45:36,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:45:36,658 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:45:36,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 22:45:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:45:36,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 22:45:36,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:45:37,095 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 22:45:37,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-20 22:45:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 22:45:37,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:45:37,451 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 22:45:37,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-11-20 22:45:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 22:45:37,525 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:45:37,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056811817] [2021-11-20 22:45:37,526 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:45:37,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125350247] [2021-11-20 22:45:37,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125350247] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:45:37,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1460916278] [2021-11-20 22:45:37,550 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-20 22:45:37,550 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:45:37,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:45:37,561 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:45:37,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:45:37,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:45:37,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:45:38,228 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:45:38,231 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:45:38,353 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:45:38,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:45:38,456 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 61 for LOIs [2021-11-20 22:45:39,147 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:45:39,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1460916278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:45:39,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:45:39,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 8] total 17 [2021-11-20 22:45:39,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566645461] [2021-11-20 22:45:39,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:45:39,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:45:39,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:45:39,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:45:39,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-11-20 22:45:39,626 INFO L87 Difference]: Start difference. First operand 147 states and 162 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 22:45:40,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:45:40,369 INFO L93 Difference]: Finished difference Result 153 states and 169 transitions. [2021-11-20 22:45:40,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:45:40,370 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2021-11-20 22:45:40,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:45:40,372 INFO L225 Difference]: With dead ends: 153 [2021-11-20 22:45:40,372 INFO L226 Difference]: Without dead ends: 153 [2021-11-20 22:45:40,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-11-20 22:45:40,375 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 2 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 22:45:40,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 395 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 22:45:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-20 22:45:40,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-11-20 22:45:40,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 77 states have (on average 2.012987012987013) internal successors, (155), 144 states have internal predecessors, (155), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 22:45:40,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 169 transitions. [2021-11-20 22:45:40,388 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 169 transitions. Word has length 48 [2021-11-20 22:45:40,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:45:40,388 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 169 transitions. [2021-11-20 22:45:40,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 22:45:40,389 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 169 transitions. [2021-11-20 22:45:40,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 22:45:40,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:45:40,390 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:45:40,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 22:45:40,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:45:40,607 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:45:40,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:45:40,608 INFO L85 PathProgramCache]: Analyzing trace with hash -239604315, now seen corresponding path program 1 times [2021-11-20 22:45:40,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:45:40,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080720193] [2021-11-20 22:45:40,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:45:40,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:45:40,621 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:45:40,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1857196930] [2021-11-20 22:45:40,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:45:40,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:45:40,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:45:40,623 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:45:40,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 22:45:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:45:40,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 22:45:40,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:45:40,924 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 22:45:40,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-20 22:45:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 22:45:40,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:45:41,176 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 22:45:41,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-11-20 22:45:41,236 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 22:45:41,236 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:45:41,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080720193] [2021-11-20 22:45:41,236 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:45:41,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857196930] [2021-11-20 22:45:41,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857196930] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:45:41,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1611598464] [2021-11-20 22:45:41,239 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-20 22:45:41,239 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:45:41,239 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:45:41,240 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:45:41,240 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:45:41,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:45:41,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:45:41,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:45:41,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:45:41,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:45:41,805 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:45:41,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 191 [2021-11-20 22:45:41,839 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:45:41,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 194 [2021-11-20 22:45:41,873 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:45:41,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 197 [2021-11-20 22:45:42,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:45:42,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:45:42,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:45:42,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:45:42,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:45:42,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:45:42,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:45:48,111 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-20 22:45:48,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:45:48,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:45:48,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:45:48,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:45:48,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:45:48,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:45:48,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 188 treesize of output 187 [2021-11-20 22:45:48,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:45:48,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 184 treesize of output 183 [2021-11-20 22:45:48,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:45:48,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 180 treesize of output 179 [2021-11-20 22:45:49,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:45:49,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:45:49,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:45:49,592 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:45:52,980 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:45:52,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:45:52,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-11-20 22:45:52,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348369366] [2021-11-20 22:45:52,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 22:45:52,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 22:45:52,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:45:52,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 22:45:52,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 22:45:52,982 INFO L87 Difference]: Start difference. First operand 153 states and 169 transitions. Second operand has 12 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 22:45:53,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:45:53,377 INFO L93 Difference]: Finished difference Result 183 states and 202 transitions. [2021-11-20 22:45:53,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:45:53,378 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 49 [2021-11-20 22:45:53,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:45:53,380 INFO L225 Difference]: With dead ends: 183 [2021-11-20 22:45:53,380 INFO L226 Difference]: Without dead ends: 183 [2021-11-20 22:45:53,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 105 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 22:45:53,382 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 97 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:45:53,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 996 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 581 Invalid, 0 Unknown, 187 Unchecked, 0.3s Time] [2021-11-20 22:45:53,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-20 22:45:53,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 151. [2021-11-20 22:45:53,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 142 states have internal predecessors, (153), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 22:45:53,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 167 transitions. [2021-11-20 22:45:53,395 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 167 transitions. Word has length 49 [2021-11-20 22:45:53,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:45:53,396 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 167 transitions. [2021-11-20 22:45:53,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 22:45:53,397 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 167 transitions. [2021-11-20 22:45:53,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 22:45:53,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:45:53,398 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:45:53,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 22:45:53,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:45:53,615 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:45:53,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:45:53,615 INFO L85 PathProgramCache]: Analyzing trace with hash -239604314, now seen corresponding path program 1 times [2021-11-20 22:45:53,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:45:53,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719915737] [2021-11-20 22:45:53,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:45:53,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:45:53,623 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:45:53,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354265228] [2021-11-20 22:45:53,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:45:53,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:45:53,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:45:53,628 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:45:53,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 22:45:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:45:53,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-20 22:45:53,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:45:55,636 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 22:45:55,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2021-11-20 22:45:55,659 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:45:55,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 54 [2021-11-20 22:46:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 22:46:00,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:46:00,960 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:00,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719915737] [2021-11-20 22:46:00,961 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:46:00,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354265228] [2021-11-20 22:46:00,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354265228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:46:00,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [840103369] [2021-11-20 22:46:00,964 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-20 22:46:00,964 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:46:00,964 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:46:00,965 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:46:00,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:46:01,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:46:01,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:46:01,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:01,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:01,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:46:01,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:01,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 201 treesize of output 200 [2021-11-20 22:46:01,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:01,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 197 treesize of output 196 [2021-11-20 22:46:01,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:01,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 193 treesize of output 192 [2021-11-20 22:46:02,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:46:02,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:02,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:02,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:46:02,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:46:02,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:46:02,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:46:07,806 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-20 22:46:07,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:46:07,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:46:08,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:08,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:08,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:46:08,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:08,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 188 treesize of output 187 [2021-11-20 22:46:08,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:08,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 184 treesize of output 183 [2021-11-20 22:46:08,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:08,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 180 treesize of output 179 [2021-11-20 22:46:08,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:08,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:08,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:46:09,101 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:46:15,390 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:46:15,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:46:15,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-20 22:46:15,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333684311] [2021-11-20 22:46:15,390 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 22:46:15,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 22:46:15,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:46:15,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 22:46:15,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1173, Unknown=1, NotChecked=0, Total=1332 [2021-11-20 22:46:15,393 INFO L87 Difference]: Start difference. First operand 151 states and 167 transitions. Second operand has 13 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 22:46:16,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:46:16,065 INFO L93 Difference]: Finished difference Result 158 states and 190 transitions. [2021-11-20 22:46:16,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 22:46:16,067 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 49 [2021-11-20 22:46:16,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:46:16,068 INFO L225 Difference]: With dead ends: 158 [2021-11-20 22:46:16,069 INFO L226 Difference]: Without dead ends: 158 [2021-11-20 22:46:16,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=180, Invalid=1459, Unknown=1, NotChecked=0, Total=1640 [2021-11-20 22:46:16,070 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 3 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 506 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:46:16,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1027 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 162 Invalid, 0 Unknown, 506 Unchecked, 0.2s Time] [2021-11-20 22:46:16,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-20 22:46:16,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2021-11-20 22:46:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 80 states have (on average 1.9625) internal successors, (157), 145 states have internal predecessors, (157), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-20 22:46:16,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 180 transitions. [2021-11-20 22:46:16,102 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 180 transitions. Word has length 49 [2021-11-20 22:46:16,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:46:16,102 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 180 transitions. [2021-11-20 22:46:16,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 22:46:16,103 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 180 transitions. [2021-11-20 22:46:16,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 22:46:16,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:46:16,105 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:46:16,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 22:46:16,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:16,322 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:46:16,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:46:16,323 INFO L85 PathProgramCache]: Analyzing trace with hash 517979709, now seen corresponding path program 2 times [2021-11-20 22:46:16,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:46:16,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951563985] [2021-11-20 22:46:16,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:16,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:16,333 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:46:16,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308837269] [2021-11-20 22:46:16,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 22:46:16,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:16,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:46:16,361 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:46:16,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 22:46:16,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 22:46:16,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:46:16,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 22:46:16,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:46:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-20 22:46:16,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:46:16,576 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:16,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951563985] [2021-11-20 22:46:16,576 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:46:16,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308837269] [2021-11-20 22:46:16,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308837269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:46:16,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:46:16,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:46:16,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289404015] [2021-11-20 22:46:16,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:46:16,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:46:16,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:46:16,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:46:16,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:46:16,579 INFO L87 Difference]: Start difference. First operand 156 states and 180 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 22:46:16,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:46:16,753 INFO L93 Difference]: Finished difference Result 153 states and 169 transitions. [2021-11-20 22:46:16,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:46:16,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 50 [2021-11-20 22:46:16,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:46:16,755 INFO L225 Difference]: With dead ends: 153 [2021-11-20 22:46:16,755 INFO L226 Difference]: Without dead ends: 152 [2021-11-20 22:46:16,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:46:16,756 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 4 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:46:16,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 494 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:46:16,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-20 22:46:16,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 146. [2021-11-20 22:46:16,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 73 states have (on average 2.041095890410959) internal successors, (149), 138 states have internal predecessors, (149), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 22:46:16,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 161 transitions. [2021-11-20 22:46:16,763 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 161 transitions. Word has length 50 [2021-11-20 22:46:16,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:46:16,764 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 161 transitions. [2021-11-20 22:46:16,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 22:46:16,765 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 161 transitions. [2021-11-20 22:46:16,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 22:46:16,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:46:16,774 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:46:16,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 22:46:16,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:16,975 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:46:16,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:46:16,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1064292079, now seen corresponding path program 3 times [2021-11-20 22:46:16,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:46:16,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083812376] [2021-11-20 22:46:16,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:16,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:16,987 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:46:16,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590087439] [2021-11-20 22:46:16,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 22:46:16,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:16,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:46:16,991 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:46:17,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 22:46:17,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 22:46:17,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:46:17,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-20 22:46:17,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:46:17,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2021-11-20 22:46:17,800 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 22:46:17,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-11-20 22:46:17,812 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:46:17,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-20 22:46:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-20 22:46:18,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:46:18,680 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:18,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083812376] [2021-11-20 22:46:18,680 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:46:18,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590087439] [2021-11-20 22:46:18,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590087439] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:46:18,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1810783122] [2021-11-20 22:46:18,682 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-20 22:46:18,683 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:46:18,683 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:46:18,683 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:46:18,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:46:18,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:46:18,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:46:18,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:46:19,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:19,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:19,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:19,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 201 treesize of output 200 [2021-11-20 22:46:19,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:19,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 197 treesize of output 196 [2021-11-20 22:46:19,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:19,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 193 treesize of output 192 [2021-11-20 22:46:20,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:20,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:46:20,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:20,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:46:20,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:46:20,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:46:20,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:46:24,851 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-20 22:46:24,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:46:24,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:46:25,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:46:25,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:46:25,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:46:25,497 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:46:25,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 182 [2021-11-20 22:46:25,521 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:46:25,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 185 [2021-11-20 22:46:25,545 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:46:25,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 188 [2021-11-20 22:46:26,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:46:26,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:26,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:26,322 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:46:30,115 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:46:30,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:46:30,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-20 22:46:30,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789724004] [2021-11-20 22:46:30,116 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 22:46:30,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 22:46:30,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:46:30,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 22:46:30,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 22:46:30,118 INFO L87 Difference]: Start difference. First operand 146 states and 161 transitions. Second operand has 10 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 22:46:30,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:46:30,802 INFO L93 Difference]: Finished difference Result 145 states and 160 transitions. [2021-11-20 22:46:30,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 22:46:30,803 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2021-11-20 22:46:30,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:46:30,804 INFO L225 Difference]: With dead ends: 145 [2021-11-20 22:46:30,804 INFO L226 Difference]: Without dead ends: 145 [2021-11-20 22:46:30,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 22:46:30,805 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 0 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:46:30,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 621 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 348 Invalid, 0 Unknown, 215 Unchecked, 0.4s Time] [2021-11-20 22:46:30,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-20 22:46:30,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-20 22:46:30,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 137 states have internal predecessors, (148), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 22:46:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 160 transitions. [2021-11-20 22:46:30,813 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 160 transitions. Word has length 54 [2021-11-20 22:46:30,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:46:30,814 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 160 transitions. [2021-11-20 22:46:30,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 22:46:30,814 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 160 transitions. [2021-11-20 22:46:30,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-20 22:46:30,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:46:30,815 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:46:30,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 22:46:31,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:31,016 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:46:31,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:46:31,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1366693289, now seen corresponding path program 1 times [2021-11-20 22:46:31,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:46:31,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490901057] [2021-11-20 22:46:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:31,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:31,034 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:46:31,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888401839] [2021-11-20 22:46:31,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:31,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:31,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:46:31,039 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:46:31,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 22:46:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:31,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 22:46:31,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:46:31,347 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 22:46:31,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-20 22:46:31,395 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 22:46:31,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-20 22:46:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 71 proven. 14 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 22:46:31,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:46:31,729 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 22:46:31,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-11-20 22:46:31,781 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 71 proven. 14 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 22:46:31,781 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:31,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490901057] [2021-11-20 22:46:31,781 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:46:31,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888401839] [2021-11-20 22:46:31,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888401839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:46:31,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1694493087] [2021-11-20 22:46:31,784 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-20 22:46:31,784 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:46:31,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:46:31,785 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:46:31,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:46:31,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:46:31,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:46:32,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:46:32,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:32,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:32,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:32,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 201 treesize of output 200 [2021-11-20 22:46:32,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:32,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 197 treesize of output 196 [2021-11-20 22:46:32,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:32,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 193 treesize of output 192 [2021-11-20 22:46:33,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:46:33,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:33,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:33,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:46:33,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:46:33,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:46:33,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:46:37,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:46:37,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 22:46:37,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:46:38,228 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-20 22:46:38,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:46:38,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:46:38,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:46:38,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:46:38,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:46:38,972 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:46:38,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 182 [2021-11-20 22:46:38,996 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:46:38,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 185 [2021-11-20 22:46:39,031 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:46:39,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 188 [2021-11-20 22:46:39,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:39,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:39,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:46:39,852 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:46:43,621 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:46:43,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:46:43,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-11-20 22:46:43,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595258095] [2021-11-20 22:46:43,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 22:46:43,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 22:46:43,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:46:43,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 22:46:43,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 22:46:43,624 INFO L87 Difference]: Start difference. First operand 145 states and 160 transitions. Second operand has 13 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 22:46:44,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:46:44,084 INFO L93 Difference]: Finished difference Result 178 states and 197 transitions. [2021-11-20 22:46:44,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 22:46:44,085 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 55 [2021-11-20 22:46:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:46:44,086 INFO L225 Difference]: With dead ends: 178 [2021-11-20 22:46:44,086 INFO L226 Difference]: Without dead ends: 178 [2021-11-20 22:46:44,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 118 SyntacticMatches, 13 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=202, Invalid=1438, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 22:46:44,088 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 167 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:46:44,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 735 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 584 Invalid, 0 Unknown, 103 Unchecked, 0.4s Time] [2021-11-20 22:46:44,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-20 22:46:44,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 148. [2021-11-20 22:46:44,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 78 states have (on average 1.935897435897436) internal successors, (151), 139 states have internal predecessors, (151), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 22:46:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 163 transitions. [2021-11-20 22:46:44,095 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 163 transitions. Word has length 55 [2021-11-20 22:46:44,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:46:44,095 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 163 transitions. [2021-11-20 22:46:44,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 22:46:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 163 transitions. [2021-11-20 22:46:44,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-20 22:46:44,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:46:44,097 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:46:44,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 22:46:44,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:44,311 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:46:44,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:46:44,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1366693290, now seen corresponding path program 1 times [2021-11-20 22:46:44,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:46:44,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43974473] [2021-11-20 22:46:44,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:44,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:44,320 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:46:44,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153360286] [2021-11-20 22:46:44,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:44,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:44,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:46:44,328 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:46:44,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 22:46:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:44,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-20 22:46:44,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:46:44,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-20 22:46:44,870 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 22:46:44,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-20 22:46:44,891 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 22:46:44,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-11-20 22:46:45,117 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 22:46:45,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 45 [2021-11-20 22:46:45,143 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 22:46:45,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 41 [2021-11-20 22:46:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 71 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 22:46:49,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:46:49,360 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:49,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43974473] [2021-11-20 22:46:49,361 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:46:49,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153360286] [2021-11-20 22:46:49,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153360286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:46:49,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [954805599] [2021-11-20 22:46:49,363 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-20 22:46:49,363 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:46:49,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:46:49,363 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:46:49,363 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:46:49,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:46:49,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:46:49,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:49,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:46:49,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:49,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:49,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 201 treesize of output 200 [2021-11-20 22:46:49,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:49,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 197 treesize of output 196 [2021-11-20 22:46:49,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:49,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 193 treesize of output 192 [2021-11-20 22:46:50,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:46:50,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:50,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:50,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:46:50,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:46:50,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:46:50,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:46:54,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:46:54,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:46:54,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 22:46:55,475 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-20 22:46:55,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:46:55,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:46:56,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:46:56,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:46:56,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:46:56,263 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:46:56,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 182 [2021-11-20 22:46:56,291 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:46:56,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 185 [2021-11-20 22:46:56,351 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:46:56,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 188 [2021-11-20 22:46:56,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:56,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:46:56,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:46:57,210 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:47:01,209 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:47:01,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:47:01,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-20 22:47:01,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818247235] [2021-11-20 22:47:01,209 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 22:47:01,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 22:47:01,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:47:01,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 22:47:01,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1233, Unknown=2, NotChecked=0, Total=1406 [2021-11-20 22:47:01,211 INFO L87 Difference]: Start difference. First operand 148 states and 163 transitions. Second operand has 13 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 22:47:01,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:47:01,879 INFO L93 Difference]: Finished difference Result 299 states and 329 transitions. [2021-11-20 22:47:01,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 22:47:01,880 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 55 [2021-11-20 22:47:01,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:47:01,882 INFO L225 Difference]: With dead ends: 299 [2021-11-20 22:47:01,882 INFO L226 Difference]: Without dead ends: 299 [2021-11-20 22:47:01,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=195, Invalid=1525, Unknown=2, NotChecked=0, Total=1722 [2021-11-20 22:47:01,884 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 151 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 383 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:47:01,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 851 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 877 Invalid, 0 Unknown, 383 Unchecked, 0.6s Time] [2021-11-20 22:47:01,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-20 22:47:01,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 156. [2021-11-20 22:47:01,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 84 states have (on average 1.880952380952381) internal successors, (158), 145 states have internal predecessors, (158), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 22:47:01,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 174 transitions. [2021-11-20 22:47:01,906 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 174 transitions. Word has length 55 [2021-11-20 22:47:01,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:47:01,907 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 174 transitions. [2021-11-20 22:47:01,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 22:47:01,907 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 174 transitions. [2021-11-20 22:47:01,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 22:47:01,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:47:01,910 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:47:01,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 22:47:02,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 22:47:02,135 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:47:02,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:47:02,136 INFO L85 PathProgramCache]: Analyzing trace with hash -582180989, now seen corresponding path program 1 times [2021-11-20 22:47:02,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:47:02,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136095409] [2021-11-20 22:47:02,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:47:02,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:47:02,144 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:47:02,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1961428853] [2021-11-20 22:47:02,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:47:02,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:47:02,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:47:02,145 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:47:02,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 22:47:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:47:02,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 22:47:02,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:47:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 22:47:02,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:47:02,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-20 22:47:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 22:47:02,520 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:47:02,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136095409] [2021-11-20 22:47:02,520 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:47:02,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961428853] [2021-11-20 22:47:02,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961428853] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:47:02,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1662742926] [2021-11-20 22:47:02,522 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-20 22:47:02,522 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:47:02,523 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:47:02,523 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:47:02,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:47:02,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:47:02,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:47:02,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:47:02,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:47:02,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:47:02,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:02,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 201 treesize of output 200 [2021-11-20 22:47:02,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:02,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 197 treesize of output 196 [2021-11-20 22:47:02,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:02,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 193 treesize of output 192 [2021-11-20 22:47:03,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:47:03,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:47:03,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:47:03,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:47:03,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:47:04,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:47:04,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:47:07,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:47:07,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 22:47:08,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:47:08,787 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-20 22:47:08,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:47:09,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:47:09,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:47:09,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:47:09,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:47:09,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:09,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 188 treesize of output 187 [2021-11-20 22:47:09,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:09,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 184 treesize of output 183 [2021-11-20 22:47:09,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:09,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 180 treesize of output 179 [2021-11-20 22:47:09,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:47:09,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:47:10,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:47:10,259 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:47:13,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1662742926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:47:13,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:47:13,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [6, 6] total 30 [2021-11-20 22:47:13,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396274030] [2021-11-20 22:47:13,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:47:13,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 22:47:13,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:47:13,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 22:47:13,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-11-20 22:47:13,826 INFO L87 Difference]: Start difference. First operand 156 states and 174 transitions. Second operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 22:47:15,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:47:15,852 INFO L93 Difference]: Finished difference Result 314 states and 349 transitions. [2021-11-20 22:47:15,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 22:47:15,853 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 56 [2021-11-20 22:47:15,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:47:15,855 INFO L225 Difference]: With dead ends: 314 [2021-11-20 22:47:15,856 INFO L226 Difference]: Without dead ends: 314 [2021-11-20 22:47:15,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 131 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 22:47:15,857 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 270 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:47:15,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 1030 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 22:47:15,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-20 22:47:15,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 209. [2021-11-20 22:47:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 127 states have (on average 1.779527559055118) internal successors, (226), 188 states have internal predecessors, (226), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 22:47:15,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 258 transitions. [2021-11-20 22:47:15,867 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 258 transitions. Word has length 56 [2021-11-20 22:47:15,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:47:15,868 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 258 transitions. [2021-11-20 22:47:15,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 22:47:15,868 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 258 transitions. [2021-11-20 22:47:15,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 22:47:15,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:47:15,869 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:47:15,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 22:47:16,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:47:16,091 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:47:16,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:47:16,092 INFO L85 PathProgramCache]: Analyzing trace with hash -666929381, now seen corresponding path program 1 times [2021-11-20 22:47:16,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:47:16,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670388991] [2021-11-20 22:47:16,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:47:16,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:47:16,100 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:47:16,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015926591] [2021-11-20 22:47:16,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:47:16,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:47:16,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:47:16,101 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:47:16,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 22:47:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:47:16,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-20 22:47:16,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:47:16,350 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 22:47:16,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 22:47:16,443 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 22:47:16,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-20 22:47:16,520 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 22:47:16,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-20 22:47:16,578 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 65 proven. 35 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 22:47:16,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:47:16,864 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:47:16,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670388991] [2021-11-20 22:47:16,865 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:47:16,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015926591] [2021-11-20 22:47:16,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015926591] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:47:16,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [429603830] [2021-11-20 22:47:16,867 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-20 22:47:16,867 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:47:16,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:47:16,868 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:47:16,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:47:17,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:47:17,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:47:17,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:47:17,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:47:17,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:47:17,350 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:47:17,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 191 [2021-11-20 22:47:17,400 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:47:17,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 194 [2021-11-20 22:47:17,456 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:47:17,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 197 [2021-11-20 22:47:19,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:47:19,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:47:19,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:47:19,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:47:19,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:47:19,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:47:19,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:47:23,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 22:47:23,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:47:23,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:47:24,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:24,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:47:24,334 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:47:24,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 30 [2021-11-20 22:47:24,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:47:24,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:24,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:47:24,530 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:47:24,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 22:47:24,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:47:24,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:24,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:24,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:47:24,775 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:47:24,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-20 22:47:24,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:24,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:24,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:47:24,973 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:47:24,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 41 treesize of output 37 [2021-11-20 22:47:26,055 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-20 22:47:26,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:47:26,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:47:26,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:47:26,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:47:26,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:47:26,782 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:47:26,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 182 [2021-11-20 22:47:26,807 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:47:26,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 185 [2021-11-20 22:47:26,855 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:47:26,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 188 [2021-11-20 22:47:27,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:47:27,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:47:27,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:47:27,673 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:47:33,073 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:47:33,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:47:33,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-20 22:47:33,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352380556] [2021-11-20 22:47:33,074 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 22:47:33,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 22:47:33,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:47:33,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 22:47:33,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 22:47:33,076 INFO L87 Difference]: Start difference. First operand 209 states and 258 transitions. Second operand has 13 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 22:47:33,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:47:33,374 INFO L93 Difference]: Finished difference Result 283 states and 353 transitions. [2021-11-20 22:47:33,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 22:47:33,374 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 59 [2021-11-20 22:47:33,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:47:33,377 INFO L225 Difference]: With dead ends: 283 [2021-11-20 22:47:33,377 INFO L226 Difference]: Without dead ends: 283 [2021-11-20 22:47:33,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 88 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=259, Invalid=1903, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 22:47:33,379 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 122 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:47:33,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 1022 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 476 Invalid, 0 Unknown, 237 Unchecked, 0.2s Time] [2021-11-20 22:47:33,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-20 22:47:33,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 251. [2021-11-20 22:47:33,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 159 states have (on average 1.6855345911949686) internal successors, (268), 220 states have internal predecessors, (268), 26 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-20 22:47:33,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 320 transitions. [2021-11-20 22:47:33,393 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 320 transitions. Word has length 59 [2021-11-20 22:47:33,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:47:33,394 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 320 transitions. [2021-11-20 22:47:33,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 22:47:33,394 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 320 transitions. [2021-11-20 22:47:33,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 22:47:33,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:47:33,395 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:47:33,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-20 22:47:33,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:47:33,619 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:47:33,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:47:33,619 INFO L85 PathProgramCache]: Analyzing trace with hash -666929380, now seen corresponding path program 1 times [2021-11-20 22:47:33,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:47:33,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076208761] [2021-11-20 22:47:33,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:47:33,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:47:33,627 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:47:33,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767988688] [2021-11-20 22:47:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:47:33,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:47:33,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:47:33,630 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:47:33,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 22:47:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:47:33,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-20 22:47:33,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:47:33,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-20 22:47:33,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2021-11-20 22:47:34,469 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-20 22:47:34,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-20 22:47:34,613 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 22:47:34,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 22:47:35,016 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 22:47:35,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-20 22:47:35,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 26 [2021-11-20 22:47:35,467 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 22:47:35,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 58 [2021-11-20 22:47:35,500 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-20 22:47:35,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 61 [2021-11-20 22:47:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 65 proven. 35 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 22:47:35,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:47:36,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:47:36,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076208761] [2021-11-20 22:47:36,091 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:47:36,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767988688] [2021-11-20 22:47:36,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767988688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:47:36,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1100035009] [2021-11-20 22:47:36,095 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-20 22:47:36,095 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:47:36,096 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:47:36,096 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:47:36,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:47:36,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:47:36,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:47:36,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:47:36,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:47:36,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:47:36,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:36,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 201 treesize of output 200 [2021-11-20 22:47:36,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:36,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 197 treesize of output 196 [2021-11-20 22:47:36,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:36,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 193 treesize of output 192 [2021-11-20 22:47:37,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:47:37,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:47:37,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:47:37,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:47:37,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:47:37,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:47:37,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:47:41,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:47:41,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:47:41,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 22:47:42,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:47:42,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:42,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:47:42,135 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:47:42,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 30 [2021-11-20 22:47:42,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:42,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:47:42,277 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:47:42,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 22:47:42,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:42,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:42,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:47:42,505 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:47:42,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 41 treesize of output 37 [2021-11-20 22:47:42,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:42,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:42,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:47:42,707 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:47:42,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-20 22:47:42,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:47:43,911 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-20 22:47:43,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:47:44,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:47:44,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:47:44,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:47:44,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:47:44,665 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:47:44,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 182 [2021-11-20 22:47:44,692 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:47:44,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 185 [2021-11-20 22:47:44,753 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:47:44,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 188 [2021-11-20 22:47:45,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:47:45,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:47:45,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:47:45,724 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:47:51,843 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:47:51,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:47:51,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-20 22:47:51,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530983328] [2021-11-20 22:47:51,843 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 22:47:51,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 22:47:51,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:47:51,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 22:47:51,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1996, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 22:47:51,845 INFO L87 Difference]: Start difference. First operand 251 states and 320 transitions. Second operand has 19 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 22:47:53,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:47:53,276 INFO L93 Difference]: Finished difference Result 257 states and 328 transitions. [2021-11-20 22:47:53,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 22:47:53,277 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 59 [2021-11-20 22:47:53,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:47:53,278 INFO L225 Difference]: With dead ends: 257 [2021-11-20 22:47:53,278 INFO L226 Difference]: Without dead ends: 257 [2021-11-20 22:47:53,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=278, Invalid=2272, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 22:47:53,280 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 1 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 499 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:47:53,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 669 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 262 Invalid, 0 Unknown, 499 Unchecked, 0.3s Time] [2021-11-20 22:47:53,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-20 22:47:53,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 255. [2021-11-20 22:47:53,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 163 states have (on average 1.6809815950920246) internal successors, (274), 224 states have internal predecessors, (274), 26 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-20 22:47:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 326 transitions. [2021-11-20 22:47:53,292 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 326 transitions. Word has length 59 [2021-11-20 22:47:53,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:47:53,293 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 326 transitions. [2021-11-20 22:47:53,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 22:47:53,293 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 326 transitions. [2021-11-20 22:47:53,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 22:47:53,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:47:53,294 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:47:53,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 22:47:53,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 22:47:53,507 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:47:53,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:47:53,508 INFO L85 PathProgramCache]: Analyzing trace with hash 800025703, now seen corresponding path program 1 times [2021-11-20 22:47:53,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:47:53,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984655235] [2021-11-20 22:47:53,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:47:53,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:47:53,515 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:47:53,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976910132] [2021-11-20 22:47:53,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:47:53,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:47:53,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:47:53,517 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:47:53,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 22:47:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:47:54,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-20 22:47:54,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:47:54,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 19 [2021-11-20 22:47:54,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-20 22:47:55,190 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-20 22:47:55,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 47 [2021-11-20 22:47:56,691 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 22:47:56,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 22:47:57,315 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 22:47:57,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 62 [2021-11-20 22:47:57,335 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 22:47:57,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 59 treesize of output 61 [2021-11-20 22:48:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 66 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 22:48:08,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:48:09,156 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:09,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984655235] [2021-11-20 22:48:09,157 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:48:09,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976910132] [2021-11-20 22:48:09,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976910132] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:48:09,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [535318068] [2021-11-20 22:48:09,158 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-20 22:48:09,158 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:48:09,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:48:09,159 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:48:09,159 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:48:09,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:48:09,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:48:09,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:48:09,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:48:09,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:48:09,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:09,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 201 treesize of output 200 [2021-11-20 22:48:09,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:09,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 197 treesize of output 196 [2021-11-20 22:48:09,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:09,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 193 treesize of output 192 [2021-11-20 22:48:10,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:48:10,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:48:10,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:48:10,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:48:10,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:48:10,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:48:10,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:48:14,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:48:14,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 22:48:14,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:48:15,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:48:15,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:15,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:48:15,565 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:48:15,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 30 [2021-11-20 22:48:15,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:15,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:48:15,690 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:48:15,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 22:48:15,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:48:15,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:15,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:15,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:48:15,944 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:48:15,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 41 treesize of output 37 [2021-11-20 22:48:16,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:16,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:16,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:48:16,151 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:48:16,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-20 22:48:17,926 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-20 22:48:18,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:48:18,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:48:18,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:48:18,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:48:18,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:48:18,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:18,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 188 treesize of output 187 [2021-11-20 22:48:18,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:18,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 184 treesize of output 183 [2021-11-20 22:48:18,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:18,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 180 treesize of output 179 [2021-11-20 22:48:19,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:48:19,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:48:19,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:48:19,531 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:48:30,199 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:48:30,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:48:30,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-20 22:48:30,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730254278] [2021-11-20 22:48:30,200 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 22:48:30,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 22:48:30,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:30,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 22:48:30,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2280, Unknown=3, NotChecked=0, Total=2550 [2021-11-20 22:48:30,202 INFO L87 Difference]: Start difference. First operand 255 states and 326 transitions. Second operand has 20 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 17 states have internal predecessors, (40), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 22:48:31,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:31,353 INFO L93 Difference]: Finished difference Result 315 states and 436 transitions. [2021-11-20 22:48:31,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 22:48:31,354 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 17 states have internal predecessors, (40), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 60 [2021-11-20 22:48:31,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:31,357 INFO L225 Difference]: With dead ends: 315 [2021-11-20 22:48:31,358 INFO L226 Difference]: Without dead ends: 315 [2021-11-20 22:48:31,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=300, Invalid=2777, Unknown=3, NotChecked=0, Total=3080 [2021-11-20 22:48:31,360 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 3 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 902 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:31,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1058 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 116 Invalid, 0 Unknown, 902 Unchecked, 0.1s Time] [2021-11-20 22:48:31,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-20 22:48:31,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 305. [2021-11-20 22:48:31,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 203 states have (on average 1.6059113300492611) internal successors, (326), 262 states have internal predecessors, (326), 34 states have call successors, (34), 4 states have call predecessors, (34), 6 states have return successors, (44), 38 states have call predecessors, (44), 34 states have call successors, (44) [2021-11-20 22:48:31,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 404 transitions. [2021-11-20 22:48:31,377 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 404 transitions. Word has length 60 [2021-11-20 22:48:31,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:31,378 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 404 transitions. [2021-11-20 22:48:31,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 17 states have internal predecessors, (40), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 22:48:31,378 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 404 transitions. [2021-11-20 22:48:31,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 22:48:31,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:31,379 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:48:31,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 22:48:31,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 22:48:31,591 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:48:31,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:31,592 INFO L85 PathProgramCache]: Analyzing trace with hash -2117357710, now seen corresponding path program 2 times [2021-11-20 22:48:31,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:31,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91132166] [2021-11-20 22:48:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:31,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:31,613 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:48:31,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441685292] [2021-11-20 22:48:31,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 22:48:31,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:48:31,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:48:31,619 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:48:31,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 22:48:31,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 22:48:31,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:48:31,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 22:48:31,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:48:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 22:48:32,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:48:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 22:48:32,293 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:32,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91132166] [2021-11-20 22:48:32,293 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:48:32,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441685292] [2021-11-20 22:48:32,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441685292] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:48:32,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [340903271] [2021-11-20 22:48:32,296 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-20 22:48:32,296 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:48:32,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:48:32,296 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:48:32,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:48:32,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:48:32,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:48:32,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:48:32,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:48:32,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:48:32,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:32,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 201 treesize of output 200 [2021-11-20 22:48:32,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:32,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 197 treesize of output 196 [2021-11-20 22:48:32,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:32,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 193 treesize of output 192 [2021-11-20 22:48:33,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:48:33,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:48:33,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:48:33,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:48:33,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:48:33,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:48:33,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:48:37,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:48:38,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:48:38,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 22:48:38,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:38,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:48:38,637 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:48:38,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 30 [2021-11-20 22:48:38,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:48:38,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:38,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:48:38,979 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:48:38,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 22:48:39,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:48:39,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:39,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:39,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:48:39,213 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:48:39,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-20 22:48:39,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:39,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:39,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:48:39,431 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:48:39,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 41 treesize of output 37 [2021-11-20 22:48:41,283 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-20 22:48:41,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:48:41,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:48:41,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:48:41,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:48:41,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:48:41,950 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:48:41,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 182 [2021-11-20 22:48:42,001 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:48:42,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 185 [2021-11-20 22:48:42,029 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:48:42,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 188 [2021-11-20 22:48:42,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:48:42,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:48:42,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:48:42,971 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:48:48,714 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:48:48,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:48:48,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-20 22:48:48,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715131451] [2021-11-20 22:48:48,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 22:48:48,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 22:48:48,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:48,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 22:48:48,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1171, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 22:48:48,715 INFO L87 Difference]: Start difference. First operand 305 states and 404 transitions. Second operand has 10 states, 8 states have (on average 4.125) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 22:48:49,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:49,338 INFO L93 Difference]: Finished difference Result 281 states and 358 transitions. [2021-11-20 22:48:49,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 22:48:49,340 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.125) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 61 [2021-11-20 22:48:49,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:49,342 INFO L225 Difference]: With dead ends: 281 [2021-11-20 22:48:49,342 INFO L226 Difference]: Without dead ends: 277 [2021-11-20 22:48:49,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 139 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=307, Invalid=1673, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 22:48:49,344 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 19 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:49,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 949 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 22:48:49,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-20 22:48:49,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2021-11-20 22:48:49,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 183 states have (on average 1.639344262295082) internal successors, (300), 244 states have internal predecessors, (300), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-20 22:48:49,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 352 transitions. [2021-11-20 22:48:49,356 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 352 transitions. Word has length 61 [2021-11-20 22:48:49,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:49,356 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 352 transitions. [2021-11-20 22:48:49,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.125) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 22:48:49,356 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 352 transitions. [2021-11-20 22:48:49,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 22:48:49,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:49,357 INFO L514 BasicCegarLoop]: trace histogram [14, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:48:49,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 22:48:49,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:48:49,575 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:48:49,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:49,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1267201669, now seen corresponding path program 3 times [2021-11-20 22:48:49,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:49,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737925218] [2021-11-20 22:48:49,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:49,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:49,593 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:48:49,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168169575] [2021-11-20 22:48:49,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 22:48:49,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:48:49,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:48:49,603 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:48:49,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 22:48:49,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 22:48:49,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:48:49,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-20 22:48:49,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:48:49,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:48:50,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-20 22:48:50,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 19 [2021-11-20 22:48:50,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-20 22:48:56,491 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 22:48:56,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 77 [2021-11-20 22:48:56,569 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 22:48:56,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 89 [2021-11-20 22:49:03,050 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 22:49:03,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 101 [2021-11-20 22:49:03,199 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 22:49:03,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 95 treesize of output 97 [2021-11-20 22:49:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 132 proven. 66 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 22:49:24,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:49:25,219 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:49:25,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737925218] [2021-11-20 22:49:25,220 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:49:25,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168169575] [2021-11-20 22:49:25,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168169575] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:49:25,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1013905126] [2021-11-20 22:49:25,221 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-20 22:49:25,222 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:49:25,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:49:25,222 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:49:25,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:49:25,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:49:25,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:49:25,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:49:25,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:49:25,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:49:25,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 201 treesize of output 200 [2021-11-20 22:49:25,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 197 treesize of output 196 [2021-11-20 22:49:25,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 193 treesize of output 192 [2021-11-20 22:49:26,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:49:26,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:49:26,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:49:26,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:49:26,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:49:26,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:49:26,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:49:31,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 22:49:31,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:49:31,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:49:31,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:31,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:49:31,733 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:49:31,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 30 [2021-11-20 22:49:31,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:31,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:49:31,906 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:49:31,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 22:49:32,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:49:32,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:32,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:32,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:49:32,523 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:49:32,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 41 treesize of output 37 [2021-11-20 22:49:32,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:32,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:32,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:49:32,587 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:49:32,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-20 22:49:32,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:49:34,629 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-20 22:49:34,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:49:34,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:49:35,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:49:35,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:49:35,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:49:35,440 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:49:35,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 182 [2021-11-20 22:49:35,467 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:49:35,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 185 [2021-11-20 22:49:35,496 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:49:35,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 188 [2021-11-20 22:49:36,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:49:36,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:49:36,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:49:36,660 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:49:54,261 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:49:54,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:49:54,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-20 22:49:54,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893305249] [2021-11-20 22:49:54,261 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 22:49:54,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 22:49:54,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:49:54,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 22:49:54,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2385, Unknown=2, NotChecked=0, Total=2652 [2021-11-20 22:49:54,263 INFO L87 Difference]: Start difference. First operand 277 states and 352 transitions. Second operand has 21 states, 18 states have (on average 2.5) internal successors, (45), 19 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 22:49:56,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:49:56,680 INFO L93 Difference]: Finished difference Result 336 states and 450 transitions. [2021-11-20 22:49:56,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 22:49:56,681 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.5) internal successors, (45), 19 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 68 [2021-11-20 22:49:56,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:49:56,684 INFO L225 Difference]: With dead ends: 336 [2021-11-20 22:49:56,684 INFO L226 Difference]: Without dead ends: 336 [2021-11-20 22:49:56,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 37.3s TimeCoverageRelationStatistics Valid=295, Invalid=2895, Unknown=2, NotChecked=0, Total=3192 [2021-11-20 22:49:56,686 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 3 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1062 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:49:56,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1173 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 148 Invalid, 0 Unknown, 1062 Unchecked, 0.1s Time] [2021-11-20 22:49:56,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-20 22:49:56,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 327. [2021-11-20 22:49:56,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 223 states have (on average 1.5784753363228698) internal successors, (352), 282 states have internal predecessors, (352), 34 states have call successors, (34), 6 states have call predecessors, (34), 8 states have return successors, (44), 38 states have call predecessors, (44), 34 states have call successors, (44) [2021-11-20 22:49:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 430 transitions. [2021-11-20 22:49:56,701 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 430 transitions. Word has length 68 [2021-11-20 22:49:56,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:49:56,702 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 430 transitions. [2021-11-20 22:49:56,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.5) internal successors, (45), 19 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 22:49:56,702 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 430 transitions. [2021-11-20 22:49:56,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 22:49:56,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:49:56,703 INFO L514 BasicCegarLoop]: trace histogram [15, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:49:56,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-20 22:49:56,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 22:49:56,919 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:49:56,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:49:56,920 INFO L85 PathProgramCache]: Analyzing trace with hash -858852514, now seen corresponding path program 4 times [2021-11-20 22:49:56,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:49:56,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623303426] [2021-11-20 22:49:56,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:56,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:49:56,926 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:49:56,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864775383] [2021-11-20 22:49:56,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 22:49:56,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:49:56,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:49:56,928 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:49:56,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 22:49:57,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:57,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-20 22:49:57,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:49:57,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 19 [2021-11-20 22:49:57,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-20 22:49:58,632 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 22:49:58,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 59 [2021-11-20 22:49:58,653 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 22:49:58,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 60 [2021-11-20 22:49:59,628 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 22:49:59,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 72 [2021-11-20 22:49:59,657 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 22:49:59,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 66 treesize of output 68 [2021-11-20 22:50:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 143 proven. 72 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-20 22:50:09,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:10,292 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:10,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623303426] [2021-11-20 22:50:10,292 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:50:10,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864775383] [2021-11-20 22:50:10,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864775383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:50:10,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1844698928] [2021-11-20 22:50:10,294 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-20 22:50:10,295 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:50:10,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:50:10,296 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:50:10,296 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:50:10,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:50:10,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:50:10,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:50:10,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:50:10,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:50:10,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:10,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 201 treesize of output 200 [2021-11-20 22:50:10,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:10,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 197 treesize of output 196 [2021-11-20 22:50:10,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:10,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 193 treesize of output 192 [2021-11-20 22:50:11,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:50:11,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:50:11,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:50:11,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:50:11,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:50:11,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:50:11,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:50:16,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:50:16,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 22:50:16,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:50:17,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:17,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:17,116 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:50:17,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 22:50:17,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:50:17,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:17,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:17,347 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:50:17,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 30 [2021-11-20 22:50:17,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:17,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:17,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:17,614 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:50:17,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-20 22:50:17,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:50:18,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:18,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:18,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:18,049 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:50:18,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 41 treesize of output 37 [2021-11-20 22:50:20,296 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-20 22:50:20,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:50:20,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:50:20,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:50:20,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:50:20,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:50:21,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:21,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 188 treesize of output 187 [2021-11-20 22:50:21,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:21,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 184 treesize of output 183 [2021-11-20 22:50:21,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:21,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 180 treesize of output 179 [2021-11-20 22:50:21,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:50:21,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:50:21,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:50:21,868 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:50:34,066 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:50:34,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:50:34,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-20 22:50:34,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518734982] [2021-11-20 22:50:34,067 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 22:50:34,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 22:50:34,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:34,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 22:50:34,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2486, Unknown=2, NotChecked=0, Total=2756 [2021-11-20 22:50:34,069 INFO L87 Difference]: Start difference. First operand 327 states and 430 transitions. Second operand has 22 states, 19 states have (on average 2.263157894736842) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 22:50:41,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:41,468 INFO L93 Difference]: Finished difference Result 518 states and 704 transitions. [2021-11-20 22:50:41,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 22:50:41,469 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.263157894736842) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 69 [2021-11-20 22:50:41,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:41,473 INFO L225 Difference]: With dead ends: 518 [2021-11-20 22:50:41,473 INFO L226 Difference]: Without dead ends: 518 [2021-11-20 22:50:41,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 88 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=321, Invalid=3337, Unknown=2, NotChecked=0, Total=3660 [2021-11-20 22:50:41,476 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 131 mSDsluCounter, 2089 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 2310 SdHoareTripleChecker+Invalid, 1668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1554 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:41,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 2310 Invalid, 1668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 1554 Unchecked, 0.1s Time] [2021-11-20 22:50:41,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-11-20 22:50:41,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 329. [2021-11-20 22:50:41,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 225 states have (on average 1.5822222222222222) internal successors, (356), 284 states have internal predecessors, (356), 34 states have call successors, (34), 6 states have call predecessors, (34), 8 states have return successors, (44), 38 states have call predecessors, (44), 34 states have call successors, (44) [2021-11-20 22:50:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 434 transitions. [2021-11-20 22:50:41,494 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 434 transitions. Word has length 69 [2021-11-20 22:50:41,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:41,495 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 434 transitions. [2021-11-20 22:50:41,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.263157894736842) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 22:50:41,495 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 434 transitions. [2021-11-20 22:50:41,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 22:50:41,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:41,497 INFO L514 BasicCegarLoop]: trace histogram [14, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:41,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:41,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 22:50:41,711 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:50:41,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:41,712 INFO L85 PathProgramCache]: Analyzing trace with hash -628537947, now seen corresponding path program 1 times [2021-11-20 22:50:41,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:41,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115265285] [2021-11-20 22:50:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:41,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:41,721 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:50:41,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218698139] [2021-11-20 22:50:41,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:41,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:41,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:41,729 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:41,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 22:50:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:41,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:50:41,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-11-20 22:50:41,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:50:41,966 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:41,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115265285] [2021-11-20 22:50:41,966 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:50:41,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218698139] [2021-11-20 22:50:41,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218698139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:41,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:41,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:50:41,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937335647] [2021-11-20 22:50:41,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:41,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:50:41,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:41,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:50:41,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:50:41,968 INFO L87 Difference]: Start difference. First operand 329 states and 434 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 22:50:42,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:42,101 INFO L93 Difference]: Finished difference Result 357 states and 469 transitions. [2021-11-20 22:50:42,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:50:42,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 69 [2021-11-20 22:50:42,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:42,105 INFO L225 Difference]: With dead ends: 357 [2021-11-20 22:50:42,110 INFO L226 Difference]: Without dead ends: 357 [2021-11-20 22:50:42,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:50:42,111 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 64 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:42,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 192 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:50:42,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-11-20 22:50:42,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 328. [2021-11-20 22:50:42,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 225 states have (on average 1.5733333333333333) internal successors, (354), 283 states have internal predecessors, (354), 34 states have call successors, (34), 6 states have call predecessors, (34), 8 states have return successors, (44), 38 states have call predecessors, (44), 34 states have call successors, (44) [2021-11-20 22:50:42,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 432 transitions. [2021-11-20 22:50:42,124 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 432 transitions. Word has length 69 [2021-11-20 22:50:42,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:42,125 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 432 transitions. [2021-11-20 22:50:42,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 22:50:42,125 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 432 transitions. [2021-11-20 22:50:42,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 22:50:42,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:42,126 INFO L514 BasicCegarLoop]: trace histogram [14, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:42,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:42,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 22:50:42,342 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:50:42,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:42,343 INFO L85 PathProgramCache]: Analyzing trace with hash -628537946, now seen corresponding path program 1 times [2021-11-20 22:50:42,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:42,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793517806] [2021-11-20 22:50:42,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:42,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:42,358 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:50:42,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786581036] [2021-11-20 22:50:42,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:42,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:42,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:42,359 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:42,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 22:50:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:42,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:50:42,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-11-20 22:50:42,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:50:42,611 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:42,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793517806] [2021-11-20 22:50:42,611 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:50:42,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786581036] [2021-11-20 22:50:42,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786581036] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:42,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:42,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:50:42,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066236716] [2021-11-20 22:50:42,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:42,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:50:42,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:42,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:50:42,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:50:42,612 INFO L87 Difference]: Start difference. First operand 328 states and 432 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 22:50:42,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:42,826 INFO L93 Difference]: Finished difference Result 335 states and 446 transitions. [2021-11-20 22:50:42,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:50:42,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 69 [2021-11-20 22:50:42,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:42,830 INFO L225 Difference]: With dead ends: 335 [2021-11-20 22:50:42,830 INFO L226 Difference]: Without dead ends: 335 [2021-11-20 22:50:42,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:50:42,831 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 116 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:42,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 143 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:50:42,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-20 22:50:42,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 327. [2021-11-20 22:50:42,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 225 states have (on average 1.5644444444444445) internal successors, (352), 282 states have internal predecessors, (352), 34 states have call successors, (34), 6 states have call predecessors, (34), 8 states have return successors, (44), 38 states have call predecessors, (44), 34 states have call successors, (44) [2021-11-20 22:50:42,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 430 transitions. [2021-11-20 22:50:42,847 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 430 transitions. Word has length 69 [2021-11-20 22:50:42,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:42,847 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 430 transitions. [2021-11-20 22:50:42,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 22:50:42,848 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 430 transitions. [2021-11-20 22:50:42,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 22:50:42,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:42,849 INFO L514 BasicCegarLoop]: trace histogram [16, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:42,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:43,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:43,063 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:50:43,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:43,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1084930597, now seen corresponding path program 5 times [2021-11-20 22:50:43,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:43,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879401115] [2021-11-20 22:50:43,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:43,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:43,073 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:50:43,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1000070472] [2021-11-20 22:50:43,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 22:50:43,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:43,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:43,074 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:43,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 22:50:43,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 22:50:43,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:50:43,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-20 22:50:43,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:43,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-20 22:50:44,288 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 22:50:44,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-11-20 22:50:44,296 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:50:44,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-11-20 22:50:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 141 proven. 30 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-20 22:50:46,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:46,679 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:46,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879401115] [2021-11-20 22:50:46,680 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:50:46,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000070472] [2021-11-20 22:50:46,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000070472] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:50:46,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1788136378] [2021-11-20 22:50:46,681 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-20 22:50:46,682 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:50:46,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:50:46,682 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:50:46,682 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:50:46,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:50:46,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:50:47,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:50:47,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:50:47,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:50:47,292 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:50:47,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 191 [2021-11-20 22:50:47,348 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:50:47,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 194 [2021-11-20 22:50:47,398 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:50:47,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 197 [2021-11-20 22:50:49,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:50:49,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:50:49,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:50:49,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:50:49,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:50:49,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:50:50,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:50:54,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 22:50:54,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:50:54,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:50:55,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:50:55,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:55,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:55,648 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:50:55,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 30 [2021-11-20 22:50:55,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:55,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:55,722 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:50:55,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 22:50:55,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:50:55,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:55,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:55,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:55,980 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:50:55,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 41 treesize of output 37 [2021-11-20 22:50:56,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:56,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:56,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:56,142 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:50:56,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-20 22:50:58,362 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-20 22:50:58,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:50:58,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:50:58,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:50:58,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:50:58,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:50:59,291 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:50:59,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 182 [2021-11-20 22:50:59,341 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:50:59,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 185 [2021-11-20 22:50:59,369 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:50:59,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 188 [2021-11-20 22:50:59,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:50:59,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:51:00,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:51:00,292 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:51:07,857 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:51:07,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:51:07,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-20 22:51:07,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542045139] [2021-11-20 22:51:07,857 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 22:51:07,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 22:51:07,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:07,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 22:51:07,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1826, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 22:51:07,858 INFO L87 Difference]: Start difference. First operand 327 states and 430 transitions. Second operand has 16 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 22:51:08,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:08,979 INFO L93 Difference]: Finished difference Result 369 states and 492 transitions. [2021-11-20 22:51:08,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 22:51:08,979 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2021-11-20 22:51:08,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:08,982 INFO L225 Difference]: With dead ends: 369 [2021-11-20 22:51:08,982 INFO L226 Difference]: Without dead ends: 331 [2021-11-20 22:51:08,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 97 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=279, Invalid=2373, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 22:51:08,984 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 0 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:08,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 708 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 612 Invalid, 0 Unknown, 137 Unchecked, 0.7s Time] [2021-11-20 22:51:08,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-20 22:51:08,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 329. [2021-11-20 22:51:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 227 states have (on average 1.550660792951542) internal successors, (352), 284 states have internal predecessors, (352), 34 states have call successors, (34), 6 states have call predecessors, (34), 8 states have return successors, (44), 38 states have call predecessors, (44), 34 states have call successors, (44) [2021-11-20 22:51:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 430 transitions. [2021-11-20 22:51:08,999 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 430 transitions. Word has length 70 [2021-11-20 22:51:08,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:08,999 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 430 transitions. [2021-11-20 22:51:08,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 22:51:08,999 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 430 transitions. [2021-11-20 22:51:09,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-20 22:51:09,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:09,001 INFO L514 BasicCegarLoop]: trace histogram [17, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:09,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:09,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:09,215 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:51:09,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:09,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1516766252, now seen corresponding path program 6 times [2021-11-20 22:51:09,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:09,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048524346] [2021-11-20 22:51:09,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:09,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:09,234 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:51:09,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [642045386] [2021-11-20 22:51:09,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 22:51:09,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:09,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:09,236 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:51:09,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 22:51:09,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 22:51:09,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:51:09,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-20 22:51:09,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:09,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2021-11-20 22:51:10,120 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 22:51:10,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-20 22:51:10,137 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 22:51:10,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-11-20 22:51:10,356 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 22:51:10,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 45 [2021-11-20 22:51:10,375 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 22:51:10,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 41 [2021-11-20 22:51:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 161 proven. 74 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-20 22:51:21,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:21,277 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:21,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048524346] [2021-11-20 22:51:21,277 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:51:21,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642045386] [2021-11-20 22:51:21,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642045386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:51:21,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [464428556] [2021-11-20 22:51:21,279 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-20 22:51:21,279 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:51:21,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:51:21,280 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:51:21,280 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:51:21,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:51:21,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:51:21,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:51:21,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:51:21,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:51:21,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:21,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 201 treesize of output 200 [2021-11-20 22:51:21,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:21,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 197 treesize of output 196 [2021-11-20 22:51:21,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:21,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 193 treesize of output 192 [2021-11-20 22:51:22,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:51:22,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:51:22,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:51:22,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:51:22,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:51:22,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:51:22,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:51:27,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 22:51:27,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:51:27,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:51:28,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:28,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:28,227 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:51:28,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 30 [2021-11-20 22:51:28,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:51:28,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:28,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:28,658 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:51:28,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 22:51:29,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:51:29,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:29,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:29,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:29,219 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:51:29,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 41 treesize of output 37 [2021-11-20 22:51:29,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:29,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:29,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:29,339 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:51:29,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-20 22:51:31,657 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-20 22:51:31,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:51:31,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:51:32,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:51:32,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:51:32,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:51:32,541 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:51:32,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 182 [2021-11-20 22:51:32,571 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:51:32,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 185 [2021-11-20 22:51:32,602 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:51:32,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 188 [2021-11-20 22:51:33,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:51:33,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:51:33,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:51:33,705 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:51:42,001 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:51:42,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:51:42,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-20 22:51:42,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139235699] [2021-11-20 22:51:42,002 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 22:51:42,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 22:51:42,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:42,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 22:51:42,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1724, Unknown=1, NotChecked=0, Total=1980 [2021-11-20 22:51:42,004 INFO L87 Difference]: Start difference. First operand 329 states and 430 transitions. Second operand has 14 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 22:51:42,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:42,733 INFO L93 Difference]: Finished difference Result 340 states and 446 transitions. [2021-11-20 22:51:42,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 22:51:42,733 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 71 [2021-11-20 22:51:42,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:42,736 INFO L225 Difference]: With dead ends: 340 [2021-11-20 22:51:42,736 INFO L226 Difference]: Without dead ends: 340 [2021-11-20 22:51:42,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 100 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=272, Invalid=1983, Unknown=1, NotChecked=0, Total=2256 [2021-11-20 22:51:42,738 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 6 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:42,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 680 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 477 Invalid, 0 Unknown, 175 Unchecked, 0.5s Time] [2021-11-20 22:51:42,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-20 22:51:42,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 283. [2021-11-20 22:51:42,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 191 states have (on average 1.612565445026178) internal successors, (308), 250 states have internal predecessors, (308), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-20 22:51:42,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 360 transitions. [2021-11-20 22:51:42,749 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 360 transitions. Word has length 71 [2021-11-20 22:51:42,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:42,750 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 360 transitions. [2021-11-20 22:51:42,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 22:51:42,750 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 360 transitions. [2021-11-20 22:51:42,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-20 22:51:42,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:42,751 INFO L514 BasicCegarLoop]: trace histogram [15, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:42,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:42,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 22:51:42,979 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:51:42,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:42,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1428833113, now seen corresponding path program 1 times [2021-11-20 22:51:42,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:42,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553603462] [2021-11-20 22:51:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:42,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:42,986 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:51:42,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1247414197] [2021-11-20 22:51:42,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:42,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:42,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:42,989 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:51:42,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 22:51:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:43,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-20 22:51:43,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:43,254 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 22:51:43,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 22:51:43,343 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 22:51:43,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-20 22:51:43,483 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-20 22:51:43,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 34 [2021-11-20 22:51:43,590 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-20 22:51:43,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 34 [2021-11-20 22:51:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 88 proven. 124 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-20 22:51:43,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:43,826 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:43,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553603462] [2021-11-20 22:51:43,826 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:51:43,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247414197] [2021-11-20 22:51:43,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247414197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:51:43,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [870106216] [2021-11-20 22:51:43,828 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2021-11-20 22:51:43,828 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:51:43,828 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:51:43,828 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:51:43,828 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:51:44,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:51:44,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:51:44,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:51:44,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:51:44,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:51:44,511 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:51:44,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 191 [2021-11-20 22:51:44,561 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:51:44,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 194 [2021-11-20 22:51:44,586 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:51:44,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 197 [2021-11-20 22:51:46,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:51:46,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:51:46,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:51:46,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:51:46,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:51:46,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:51:46,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:51:51,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:51:51,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 22:51:51,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:51:52,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:51:52,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:52,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:52,928 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:51:52,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 30 [2021-11-20 22:51:53,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:53,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:53,055 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:51:53,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 22:51:53,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:53,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:53,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:53,621 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:51:53,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-20 22:51:53,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:53,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:53,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:53,745 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:51:53,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 41 treesize of output 37 [2021-11-20 22:51:53,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:51:55,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:55,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:55,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:55,527 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-20 22:51:55,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 54 [2021-11-20 22:51:55,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:55,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:55,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:55,876 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-20 22:51:55,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 52 [2021-11-20 22:51:56,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:51:56,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:56,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:56,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:56,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:56,760 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-20 22:51:56,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 case distinctions, treesize of input 89 treesize of output 70 [2021-11-20 22:51:57,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:51:57,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:57,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:57,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:57,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:57,509 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-11-20 22:51:57,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 case distinctions, treesize of input 78 treesize of output 69 [2021-11-20 22:52:00,013 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-20 22:52:00,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:52:00,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:52:00,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:52:00,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:52:00,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:52:01,056 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:52:01,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 182 [2021-11-20 22:52:01,088 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:52:01,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 185 [2021-11-20 22:52:01,121 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:52:01,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 188 [2021-11-20 22:52:01,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:52:01,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:52:02,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:52:02,336 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:52:12,747 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:52:12,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:52:12,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-20 22:52:12,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599331574] [2021-11-20 22:52:12,748 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 22:52:12,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 22:52:12,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:12,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 22:52:12,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2162, Unknown=0, NotChecked=0, Total=2450 [2021-11-20 22:52:12,750 INFO L87 Difference]: Start difference. First operand 283 states and 360 transitions. Second operand has 17 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 22:52:13,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:13,075 INFO L93 Difference]: Finished difference Result 420 states and 553 transitions. [2021-11-20 22:52:13,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 22:52:13,075 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 72 [2021-11-20 22:52:13,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:13,078 INFO L225 Difference]: With dead ends: 420 [2021-11-20 22:52:13,078 INFO L226 Difference]: Without dead ends: 420 [2021-11-20 22:52:13,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=315, Invalid=2547, Unknown=0, NotChecked=0, Total=2862 [2021-11-20 22:52:13,080 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 109 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:13,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 974 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 434 Invalid, 0 Unknown, 283 Unchecked, 0.2s Time] [2021-11-20 22:52:13,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-11-20 22:52:13,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 391. [2021-11-20 22:52:13,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 277 states have (on average 1.552346570397112) internal successors, (430), 336 states have internal predecessors, (430), 48 states have call successors, (48), 6 states have call predecessors, (48), 6 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-11-20 22:52:13,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 526 transitions. [2021-11-20 22:52:13,094 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 526 transitions. Word has length 72 [2021-11-20 22:52:13,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:13,094 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 526 transitions. [2021-11-20 22:52:13,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 22:52:13,095 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 526 transitions. [2021-11-20 22:52:13,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-20 22:52:13,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:13,096 INFO L514 BasicCegarLoop]: trace histogram [15, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:13,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:13,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:52:13,319 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:52:13,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:13,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1428833112, now seen corresponding path program 1 times [2021-11-20 22:52:13,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:13,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188752202] [2021-11-20 22:52:13,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:13,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:13,327 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:52:13,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358800046] [2021-11-20 22:52:13,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:13,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:52:13,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:52:13,330 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:52:13,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 22:52:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:14,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 139 conjunts are in the unsatisfiable core [2021-11-20 22:52:14,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:14,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:52:14,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-20 22:52:14,417 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 22:52:14,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 22:52:14,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 14 treesize of output 16 [2021-11-20 22:52:14,782 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-20 22:52:14,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-20 22:52:14,842 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 22:52:14,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-20 22:52:15,293 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 22:52:15,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 54 [2021-11-20 22:52:15,336 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-20 22:52:15,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 51 treesize of output 69 [2021-11-20 22:52:15,753 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 22:52:15,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 75 [2021-11-20 22:52:15,790 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-20 22:52:15,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 75 [2021-11-20 22:52:31,447 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 41 proven. 192 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 22:52:31,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:31,712 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:31,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188752202] [2021-11-20 22:52:31,712 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:52:31,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358800046] [2021-11-20 22:52:31,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358800046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:52:31,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [842562002] [2021-11-20 22:52:31,714 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2021-11-20 22:52:31,714 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:52:31,714 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:52:31,715 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:52:31,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:52:31,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:52:31,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:52:32,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:52:32,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:52:32,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:52:32,551 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:52:32,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 191 [2021-11-20 22:52:32,602 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:52:32,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 194 [2021-11-20 22:52:32,650 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:52:32,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 197 [2021-11-20 22:52:34,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:52:34,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:52:34,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:52:34,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:52:34,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:52:34,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:52:34,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:52:39,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 22:52:39,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:52:39,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:52:40,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:40,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:40,836 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:52:40,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 22:52:40,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:52:41,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:41,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:41,371 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:52:41,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 30 [2021-11-20 22:52:41,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:41,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:41,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:41,636 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:52:41,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 41 treesize of output 37 [2021-11-20 22:52:41,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:41,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:41,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:42,004 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:52:42,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-20 22:52:42,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:52:44,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:52:44,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:44,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:44,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:44,375 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-20 22:52:44,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 54 [2021-11-20 22:52:44,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:44,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:44,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:44,786 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-20 22:52:44,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 52 [2021-11-20 22:52:45,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:52:45,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:45,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:45,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:45,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:45,351 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-11-20 22:52:45,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 case distinctions, treesize of input 51 treesize of output 68 [2021-11-20 22:52:46,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:46,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:46,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:46,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:46,468 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-20 22:52:46,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 case distinctions, treesize of input 95 treesize of output 70 [2021-11-20 22:52:48,911 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-20 22:52:49,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:52:49,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:52:49,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:52:49,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:52:49,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:52:49,780 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:52:49,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 182 [2021-11-20 22:52:49,815 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:52:49,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 185 [2021-11-20 22:52:49,845 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:52:49,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 188 [2021-11-20 22:52:50,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:52:50,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:52:50,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:52:51,006 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:53:04,205 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:53:04,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:53:04,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-20 22:53:04,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996113533] [2021-11-20 22:53:04,205 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 22:53:04,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 22:53:04,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:04,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 22:53:04,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=3200, Unknown=7, NotChecked=0, Total=3540 [2021-11-20 22:53:04,208 INFO L87 Difference]: Start difference. First operand 391 states and 526 transitions. Second operand has 27 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 22:53:05,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:05,379 INFO L93 Difference]: Finished difference Result 579 states and 775 transitions. [2021-11-20 22:53:05,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 22:53:05,379 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 72 [2021-11-20 22:53:05,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:05,383 INFO L225 Difference]: With dead ends: 579 [2021-11-20 22:53:05,383 INFO L226 Difference]: Without dead ends: 579 [2021-11-20 22:53:05,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 94 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=381, Invalid=3902, Unknown=7, NotChecked=0, Total=4290 [2021-11-20 22:53:05,384 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 136 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1005 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:05,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 1380 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1235 Invalid, 0 Unknown, 1005 Unchecked, 0.8s Time] [2021-11-20 22:53:05,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-11-20 22:53:05,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 441. [2021-11-20 22:53:05,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 317 states have (on average 1.5173501577287065) internal successors, (481), 376 states have internal predecessors, (481), 56 states have call successors, (56), 6 states have call predecessors, (56), 8 states have return successors, (76), 58 states have call predecessors, (76), 56 states have call successors, (76) [2021-11-20 22:53:05,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 613 transitions. [2021-11-20 22:53:05,402 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 613 transitions. Word has length 72 [2021-11-20 22:53:05,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:05,402 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 613 transitions. [2021-11-20 22:53:05,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 22:53:05,403 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 613 transitions. [2021-11-20 22:53:05,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-20 22:53:05,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:05,404 INFO L514 BasicCegarLoop]: trace histogram [16, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:05,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 22:53:05,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:53:05,619 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:53:05,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:05,620 INFO L85 PathProgramCache]: Analyzing trace with hash 108420063, now seen corresponding path program 2 times [2021-11-20 22:53:05,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:05,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926625677] [2021-11-20 22:53:05,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:05,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:05,634 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:53:05,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254394453] [2021-11-20 22:53:05,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 22:53:05,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:53:05,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:53:05,636 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:53:05,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 22:53:06,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 22:53:06,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:53:06,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 22:53:06,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 100 proven. 10 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-20 22:53:06,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 100 proven. 10 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-20 22:53:07,231 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:07,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926625677] [2021-11-20 22:53:07,231 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:53:07,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254394453] [2021-11-20 22:53:07,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254394453] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:53:07,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2043403858] [2021-11-20 22:53:07,233 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2021-11-20 22:53:07,233 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:53:07,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:53:07,234 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:53:07,234 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:53:07,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:53:07,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:53:07,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:53:07,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:53:07,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:53:07,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:07,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 201 treesize of output 200 [2021-11-20 22:53:07,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:07,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 197 treesize of output 196 [2021-11-20 22:53:07,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:07,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 193 treesize of output 192 [2021-11-20 22:53:08,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:53:08,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:53:08,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:53:09,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:53:09,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:53:09,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:53:09,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:53:13,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:53:14,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 22:53:14,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:53:15,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:53:15,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:15,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:53:15,396 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:53:15,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 30 [2021-11-20 22:53:15,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:15,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:53:15,653 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:53:15,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 22:53:15,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:15,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:15,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:53:15,877 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:53:15,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 41 treesize of output 37 [2021-11-20 22:53:16,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:16,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:16,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:53:16,291 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:53:16,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-20 22:53:16,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:53:18,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:53:18,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:18,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:53:18,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:53:18,835 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-20 22:53:18,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 54 [2021-11-20 22:53:19,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:19,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:53:19,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:53:19,170 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-20 22:53:19,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 52 [2021-11-20 22:53:19,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:19,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:53:19,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:19,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:53:19,721 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-11-20 22:53:19,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 case distinctions, treesize of input 78 treesize of output 69 [2021-11-20 22:53:20,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:20,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:20,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:53:20,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:53:20,313 INFO L354 Elim1Store]: treesize reduction 48, result has 39.2 percent of original size [2021-11-20 22:53:20,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 case distinctions, treesize of input 60 treesize of output 67 [2021-11-20 22:53:20,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:53:22,660 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-20 22:53:22,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:53:22,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:53:23,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:53:23,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:53:23,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:53:23,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:23,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 188 treesize of output 187 [2021-11-20 22:53:23,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:23,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 184 treesize of output 183 [2021-11-20 22:53:23,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:23,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 180 treesize of output 179 [2021-11-20 22:53:24,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:53:24,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:53:24,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:53:24,473 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:53:34,579 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:53:34,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:53:34,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-20 22:53:34,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816308658] [2021-11-20 22:53:34,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 22:53:34,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 22:53:34,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:34,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 22:53:34,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1849, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 22:53:34,580 INFO L87 Difference]: Start difference. First operand 441 states and 613 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 16 states have internal predecessors, (42), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 22:53:36,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:36,081 INFO L93 Difference]: Finished difference Result 427 states and 570 transitions. [2021-11-20 22:53:36,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 22:53:36,083 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 16 states have internal predecessors, (42), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2021-11-20 22:53:36,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:36,086 INFO L225 Difference]: With dead ends: 427 [2021-11-20 22:53:36,086 INFO L226 Difference]: Without dead ends: 413 [2021-11-20 22:53:36,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 166 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=540, Invalid=3120, Unknown=0, NotChecked=0, Total=3660 [2021-11-20 22:53:36,087 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 87 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:36,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 823 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 22:53:36,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-11-20 22:53:36,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 413. [2021-11-20 22:53:36,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 299 states have (on average 1.5050167224080269) internal successors, (450), 358 states have internal predecessors, (450), 48 states have call successors, (48), 6 states have call predecessors, (48), 6 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-11-20 22:53:36,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 546 transitions. [2021-11-20 22:53:36,101 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 546 transitions. Word has length 73 [2021-11-20 22:53:36,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:36,101 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 546 transitions. [2021-11-20 22:53:36,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 16 states have internal predecessors, (42), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 22:53:36,102 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 546 transitions. [2021-11-20 22:53:36,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-20 22:53:36,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:36,103 INFO L514 BasicCegarLoop]: trace histogram [35, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:36,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 22:53:36,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 22:53:36,331 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:53:36,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:36,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1601141228, now seen corresponding path program 3 times [2021-11-20 22:53:36,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:36,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200668538] [2021-11-20 22:53:36,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:36,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:36,339 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:53:36,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107363746] [2021-11-20 22:53:36,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 22:53:36,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:53:36,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:53:36,340 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:53:36,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 22:53:38,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 22:53:38,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:53:38,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-20 22:53:38,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:38,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2021-11-20 22:53:40,081 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-20 22:53:40,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-20 22:53:40,374 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 22:53:40,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 22:53:41,378 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 22:53:41,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-20 22:53:41,408 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-20 22:53:41,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-20 22:53:42,885 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 22:53:42,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 61 [2021-11-20 22:53:43,061 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-20 22:53:43,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 61 treesize of output 79 [2021-11-20 22:53:44,042 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 22:53:44,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 82 [2021-11-20 22:53:44,229 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-20 22:53:44,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 88 [2021-11-20 22:54:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 233 proven. 510 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-11-20 22:54:02,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:54:03,368 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:03,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200668538] [2021-11-20 22:54:03,368 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:54:03,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107363746] [2021-11-20 22:54:03,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107363746] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:54:03,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1270996945] [2021-11-20 22:54:03,370 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2021-11-20 22:54:03,370 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:54:03,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:54:03,370 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:54:03,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:54:03,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:54:03,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:54:03,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:54:03,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:54:03,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:54:04,165 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:54:04,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 191 [2021-11-20 22:54:04,223 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:54:04,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 194 [2021-11-20 22:54:04,282 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:54:04,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 197 [2021-11-20 22:54:06,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:54:06,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:54:06,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:54:06,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:54:06,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:54:06,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:54:06,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:54:11,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 22:54:11,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:54:12,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:54:13,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:13,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:13,215 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:54:13,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 30 [2021-11-20 22:54:13,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:54:13,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:13,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:13,409 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:54:13,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 22:54:13,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:13,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:13,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:13,944 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:54:13,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-20 22:54:14,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:54:14,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:14,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:14,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:14,450 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:54:14,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 41 treesize of output 37 [2021-11-20 22:54:16,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:16,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:16,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:17,049 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-20 22:54:17,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 52 [2021-11-20 22:54:17,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:17,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:17,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:17,525 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-20 22:54:17,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 54 [2021-11-20 22:54:17,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:54:17,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:17,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:17,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:17,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:17,977 INFO L354 Elim1Store]: treesize reduction 48, result has 39.2 percent of original size [2021-11-20 22:54:17,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 case distinctions, treesize of input 60 treesize of output 67 [2021-11-20 22:54:18,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:54:18,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:18,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:18,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:18,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:18,937 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-11-20 22:54:18,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 case distinctions, treesize of input 51 treesize of output 68 [2021-11-20 22:54:21,455 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-20 22:54:21,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:54:21,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:54:22,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:54:22,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:54:22,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:54:22,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:22,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 188 treesize of output 187 [2021-11-20 22:54:22,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:22,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 184 treesize of output 183 [2021-11-20 22:54:22,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:22,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 180 treesize of output 179 [2021-11-20 22:54:22,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:54:22,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:54:23,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:54:23,387 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:54:40,458 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:54:40,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:54:40,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-20 22:54:40,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74146168] [2021-11-20 22:54:40,459 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 22:54:40,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 22:54:40,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:40,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 22:54:40,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=3097, Unknown=6, NotChecked=0, Total=3422 [2021-11-20 22:54:40,460 INFO L87 Difference]: Start difference. First operand 413 states and 546 transitions. Second operand has 25 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 21 states have internal predecessors, (51), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 22:54:43,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:43,267 INFO L93 Difference]: Finished difference Result 469 states and 608 transitions. [2021-11-20 22:54:43,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 22:54:43,267 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 21 states have internal predecessors, (51), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 92 [2021-11-20 22:54:43,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:43,269 INFO L225 Difference]: With dead ends: 469 [2021-11-20 22:54:43,269 INFO L226 Difference]: Without dead ends: 469 [2021-11-20 22:54:43,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 131 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=349, Invalid=3551, Unknown=6, NotChecked=0, Total=3906 [2021-11-20 22:54:43,270 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 5 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 866 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:43,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1086 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 290 Invalid, 0 Unknown, 866 Unchecked, 1.1s Time] [2021-11-20 22:54:43,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-11-20 22:54:43,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 469. [2021-11-20 22:54:43,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 347 states have (on average 1.4524495677233429) internal successors, (504), 410 states have internal predecessors, (504), 52 states have call successors, (52), 10 states have call predecessors, (52), 10 states have return successors, (52), 48 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-20 22:54:43,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 608 transitions. [2021-11-20 22:54:43,285 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 608 transitions. Word has length 92 [2021-11-20 22:54:43,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:43,286 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 608 transitions. [2021-11-20 22:54:43,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 21 states have internal predecessors, (51), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 22:54:43,286 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 608 transitions. [2021-11-20 22:54:43,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 22:54:43,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:43,288 INFO L514 BasicCegarLoop]: trace histogram [35, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:54:43,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 22:54:43,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 22:54:43,503 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:54:43,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:43,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1904229508, now seen corresponding path program 1 times [2021-11-20 22:54:43,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:43,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418443009] [2021-11-20 22:54:43,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:43,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:43,510 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:54:43,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318504383] [2021-11-20 22:54:43,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:43,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:54:43,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:54:43,512 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:54:43,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 22:54:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:43,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 22:54:43,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:54:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2021-11-20 22:54:43,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:54:43,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:43,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418443009] [2021-11-20 22:54:43,813 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:54:43,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318504383] [2021-11-20 22:54:43,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318504383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:43,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:43,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:54:43,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078896968] [2021-11-20 22:54:43,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:43,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:54:43,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:43,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:54:43,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:54:43,815 INFO L87 Difference]: Start difference. First operand 469 states and 608 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 22:54:43,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:43,971 INFO L93 Difference]: Finished difference Result 495 states and 635 transitions. [2021-11-20 22:54:43,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:54:43,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 93 [2021-11-20 22:54:43,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:43,974 INFO L225 Difference]: With dead ends: 495 [2021-11-20 22:54:43,974 INFO L226 Difference]: Without dead ends: 495 [2021-11-20 22:54:43,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:54:43,974 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 203 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:43,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 208 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:54:43,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-11-20 22:54:43,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 468. [2021-11-20 22:54:43,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 347 states have (on average 1.446685878962536) internal successors, (502), 409 states have internal predecessors, (502), 52 states have call successors, (52), 10 states have call predecessors, (52), 10 states have return successors, (52), 48 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-20 22:54:43,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 606 transitions. [2021-11-20 22:54:43,989 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 606 transitions. Word has length 93 [2021-11-20 22:54:43,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:43,989 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 606 transitions. [2021-11-20 22:54:43,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 22:54:43,990 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 606 transitions. [2021-11-20 22:54:43,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 22:54:43,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:43,991 INFO L514 BasicCegarLoop]: trace histogram [35, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:54:44,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 22:54:44,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:54:44,207 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:54:44,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:44,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1904229509, now seen corresponding path program 1 times [2021-11-20 22:54:44,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:44,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919751064] [2021-11-20 22:54:44,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:44,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:44,221 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:54:44,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1115571072] [2021-11-20 22:54:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:44,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:54:44,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:54:44,222 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:54:44,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 22:54:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:44,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 22:54:44,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:54:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 78 proven. 147 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2021-11-20 22:54:44,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:54:44,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:54:44,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-11-20 22:54:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 78 proven. 147 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2021-11-20 22:54:45,193 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:45,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919751064] [2021-11-20 22:54:45,193 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:54:45,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115571072] [2021-11-20 22:54:45,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115571072] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:54:45,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1133085083] [2021-11-20 22:54:45,194 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2021-11-20 22:54:45,195 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:54:45,195 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:54:45,195 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:54:45,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:54:45,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:54:45,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:54:45,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:54:45,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:54:45,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:54:45,963 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:54:45,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 191 [2021-11-20 22:54:46,020 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:54:46,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 194 [2021-11-20 22:54:46,078 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:54:46,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 197 [2021-11-20 22:54:48,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:54:48,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:54:48,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:54:48,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:54:48,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:54:48,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:54:48,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:54:53,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:54:53,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:54:53,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 22:54:54,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:54,972 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:54:54,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 22:54:55,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:55,276 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:54:55,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 30 [2021-11-20 22:54:55,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:54:55,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:55,689 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:54:55,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 41 treesize of output 37 [2021-11-20 22:54:56,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:54:56,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:56,316 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:54:56,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-20 22:54:58,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:58,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:58,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:58,628 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-20 22:54:58,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 54 [2021-11-20 22:54:59,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:54:59,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:59,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:59,762 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-20 22:54:59,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 52 [2021-11-20 22:55:00,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:00,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:00,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:00,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:00,281 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-20 22:55:00,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 case distinctions, treesize of input 95 treesize of output 70 [2021-11-20 22:55:00,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:55:01,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:01,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:01,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:01,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:01,124 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-11-20 22:55:01,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 case distinctions, treesize of input 51 treesize of output 68 [2021-11-20 22:55:04,771 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-20 22:55:05,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:55:05,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:55:05,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:55:05,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:55:05,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:55:05,920 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:55:05,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 182 [2021-11-20 22:55:05,954 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:55:05,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 185 [2021-11-20 22:55:05,987 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:55:05,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 188 [2021-11-20 22:55:06,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:55:07,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:55:07,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:55:07,482 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:55:19,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1133085083] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:19,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:55:19,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [7, 7] total 44 [2021-11-20 22:55:19,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101517612] [2021-11-20 22:55:19,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:19,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 22:55:19,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:19,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 22:55:19,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1622, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 22:55:19,215 INFO L87 Difference]: Start difference. First operand 468 states and 606 transitions. Second operand has 33 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 22:55:22,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:22,901 INFO L93 Difference]: Finished difference Result 566 states and 690 transitions. [2021-11-20 22:55:22,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 22:55:22,902 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 93 [2021-11-20 22:55:22,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:22,905 INFO L225 Difference]: With dead ends: 566 [2021-11-20 22:55:22,905 INFO L226 Difference]: Without dead ends: 566 [2021-11-20 22:55:22,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 228 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=376, Invalid=1786, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 22:55:22,906 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 356 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:22,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 916 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1510 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 22:55:22,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-20 22:55:22,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 468. [2021-11-20 22:55:22,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 347 states have (on average 1.4322766570605188) internal successors, (497), 409 states have internal predecessors, (497), 52 states have call successors, (52), 10 states have call predecessors, (52), 10 states have return successors, (52), 48 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-20 22:55:22,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 601 transitions. [2021-11-20 22:55:22,920 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 601 transitions. Word has length 93 [2021-11-20 22:55:22,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:22,921 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 601 transitions. [2021-11-20 22:55:22,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 22:55:22,921 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 601 transitions. [2021-11-20 22:55:22,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-20 22:55:22,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:22,922 INFO L514 BasicCegarLoop]: trace histogram [35, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:22,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-20 22:55:23,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 22:55:23,135 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:55:23,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:23,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1098419928, now seen corresponding path program 1 times [2021-11-20 22:55:23,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:23,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336780511] [2021-11-20 22:55:23,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:23,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:23,151 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:55:23,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754451090] [2021-11-20 22:55:23,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:23,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:55:23,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:55:23,153 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:55:23,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 22:55:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:23,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:55:23,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:55:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2021-11-20 22:55:23,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:55:23,475 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:23,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336780511] [2021-11-20 22:55:23,475 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:55:23,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754451090] [2021-11-20 22:55:23,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754451090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:23,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:55:23,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:55:23,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864248951] [2021-11-20 22:55:23,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:23,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:55:23,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:23,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:55:23,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:55:23,478 INFO L87 Difference]: Start difference. First operand 468 states and 601 transitions. Second operand has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 22:55:23,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:23,672 INFO L93 Difference]: Finished difference Result 492 states and 626 transitions. [2021-11-20 22:55:23,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:55:23,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 94 [2021-11-20 22:55:23,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:23,676 INFO L225 Difference]: With dead ends: 492 [2021-11-20 22:55:23,676 INFO L226 Difference]: Without dead ends: 492 [2021-11-20 22:55:23,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:55:23,677 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 52 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:23,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 194 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:55:23,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-11-20 22:55:23,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 467. [2021-11-20 22:55:23,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 347 states have (on average 1.4265129682997117) internal successors, (495), 408 states have internal predecessors, (495), 52 states have call successors, (52), 10 states have call predecessors, (52), 10 states have return successors, (52), 48 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-20 22:55:23,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 599 transitions. [2021-11-20 22:55:23,704 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 599 transitions. Word has length 94 [2021-11-20 22:55:23,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:23,705 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 599 transitions. [2021-11-20 22:55:23,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 22:55:23,705 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 599 transitions. [2021-11-20 22:55:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-20 22:55:23,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:23,706 INFO L514 BasicCegarLoop]: trace histogram [35, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:23,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-20 22:55:23,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 22:55:23,919 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:55:23,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:23,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1098419927, now seen corresponding path program 1 times [2021-11-20 22:55:23,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:23,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754027565] [2021-11-20 22:55:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:23,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:23,927 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:55:23,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978777715] [2021-11-20 22:55:23,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:23,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:55:23,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:55:23,928 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:55:23,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 22:55:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:24,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:55:24,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:55:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2021-11-20 22:55:24,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:55:24,221 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:24,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754027565] [2021-11-20 22:55:24,221 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:55:24,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978777715] [2021-11-20 22:55:24,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978777715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:24,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:55:24,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:55:24,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92461558] [2021-11-20 22:55:24,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:24,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:55:24,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:24,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:55:24,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:55:24,223 INFO L87 Difference]: Start difference. First operand 467 states and 599 transitions. Second operand has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 22:55:24,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:24,551 INFO L93 Difference]: Finished difference Result 470 states and 603 transitions. [2021-11-20 22:55:24,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:55:24,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 94 [2021-11-20 22:55:24,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:24,556 INFO L225 Difference]: With dead ends: 470 [2021-11-20 22:55:24,556 INFO L226 Difference]: Without dead ends: 470 [2021-11-20 22:55:24,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:55:24,557 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 104 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:24,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 144 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 22:55:24,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-11-20 22:55:24,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 466. [2021-11-20 22:55:24,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 347 states have (on average 1.420749279538905) internal successors, (493), 407 states have internal predecessors, (493), 52 states have call successors, (52), 10 states have call predecessors, (52), 10 states have return successors, (52), 48 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-20 22:55:24,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 597 transitions. [2021-11-20 22:55:24,570 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 597 transitions. Word has length 94 [2021-11-20 22:55:24,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:24,571 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 597 transitions. [2021-11-20 22:55:24,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 22:55:24,571 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 597 transitions. [2021-11-20 22:55:24,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 22:55:24,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:24,572 INFO L514 BasicCegarLoop]: trace histogram [35, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:24,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-20 22:55:24,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 22:55:24,799 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:55:24,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:24,799 INFO L85 PathProgramCache]: Analyzing trace with hash 980648362, now seen corresponding path program 1 times [2021-11-20 22:55:24,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:24,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902226184] [2021-11-20 22:55:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:24,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:24,811 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:55:24,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722552960] [2021-11-20 22:55:24,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:24,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:55:24,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:55:24,813 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:55:24,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 22:55:25,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:25,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-20 22:55:25,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:55:25,181 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 22:55:25,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 22:55:25,312 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 22:55:25,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-20 22:55:25,553 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-20 22:55:25,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 42 [2021-11-20 22:55:27,850 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-11-20 22:55:27,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 39 treesize of output 50 [2021-11-20 22:55:28,007 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-11-20 22:55:28,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 39 treesize of output 50 [2021-11-20 22:55:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 120 proven. 513 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-20 22:55:28,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:55:28,555 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:28,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902226184] [2021-11-20 22:55:28,555 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:55:28,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722552960] [2021-11-20 22:55:28,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722552960] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:55:28,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [922829501] [2021-11-20 22:55:28,556 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2021-11-20 22:55:28,556 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:55:28,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:55:28,557 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:55:28,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:55:28,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:55:28,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:55:29,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:55:29,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:55:29,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:55:29,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:29,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 201 treesize of output 200 [2021-11-20 22:55:29,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:29,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 197 treesize of output 196 [2021-11-20 22:55:29,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:29,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 193 treesize of output 192 [2021-11-20 22:55:30,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:55:30,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:55:30,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:55:30,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:55:30,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:55:30,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:55:30,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:55:35,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:55:35,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 22:55:36,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:55:37,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:37,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:37,464 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:55:37,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 22:55:37,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:37,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:37,545 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:55:37,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 30 [2021-11-20 22:55:37,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:55:38,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:38,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:38,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:38,279 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:55:38,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-20 22:55:38,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:38,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:38,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:38,461 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:55:38,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 41 treesize of output 37 [2021-11-20 22:55:38,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:55:41,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:41,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:41,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:41,080 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-20 22:55:41,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 54 [2021-11-20 22:55:41,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:41,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:41,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:41,620 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-20 22:55:41,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 52 [2021-11-20 22:55:42,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:55:42,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:42,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:42,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:42,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:42,750 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-11-20 22:55:42,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 case distinctions, treesize of input 51 treesize of output 68 [2021-11-20 22:55:43,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:55:43,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:43,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:43,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:43,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:43,822 INFO L354 Elim1Store]: treesize reduction 48, result has 39.2 percent of original size [2021-11-20 22:55:43,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 case distinctions, treesize of input 60 treesize of output 67 [2021-11-20 22:55:46,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:46,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:46,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:46,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:46,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:46,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:46,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:46,707 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-11-20 22:55:46,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 73 treesize of output 84 [2021-11-20 22:55:47,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:47,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:47,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:47,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:47,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:47,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:47,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:47,103 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-11-20 22:55:47,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 80 treesize of output 91 [2021-11-20 22:55:47,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:55:47,796 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-20 22:55:47,818 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-20 22:55:47,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:55:47,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:55:48,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:55:48,513 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-20 22:55:48,850 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-20 22:55:49,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:55:49,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:55:49,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:55:49,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:55:49,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:55:49,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:49,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 188 treesize of output 187 [2021-11-20 22:55:49,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:49,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 184 treesize of output 183 [2021-11-20 22:55:49,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:49,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 180 treesize of output 179 [2021-11-20 22:55:50,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:55:50,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:55:50,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:55:50,787 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:56:05,183 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:56:05,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:56:05,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-20 22:56:05,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981958282] [2021-11-20 22:56:05,183 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 22:56:05,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 22:56:05,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:56:05,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 22:56:05,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=3298, Unknown=0, NotChecked=0, Total=3660 [2021-11-20 22:56:05,184 INFO L87 Difference]: Start difference. First operand 466 states and 597 transitions. Second operand has 24 states, 18 states have (on average 2.611111111111111) internal successors, (47), 19 states have internal predecessors, (47), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 22:56:05,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:56:05,680 INFO L93 Difference]: Finished difference Result 647 states and 843 transitions. [2021-11-20 22:56:05,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 22:56:05,681 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 2.611111111111111) internal successors, (47), 19 states have internal predecessors, (47), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 96 [2021-11-20 22:56:05,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:56:05,685 INFO L225 Difference]: With dead ends: 647 [2021-11-20 22:56:05,685 INFO L226 Difference]: Without dead ends: 647 [2021-11-20 22:56:05,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 139 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=410, Invalid=3880, Unknown=0, NotChecked=0, Total=4290 [2021-11-20 22:56:05,687 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 56 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:56:05,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 1169 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 554 Invalid, 0 Unknown, 319 Unchecked, 0.3s Time] [2021-11-20 22:56:05,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-11-20 22:56:05,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 614. [2021-11-20 22:56:05,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 467 states have (on average 1.404710920770878) internal successors, (656), 529 states have internal predecessors, (656), 80 states have call successors, (80), 10 states have call predecessors, (80), 10 states have return successors, (80), 74 states have call predecessors, (80), 80 states have call successors, (80) [2021-11-20 22:56:05,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 816 transitions. [2021-11-20 22:56:05,704 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 816 transitions. Word has length 96 [2021-11-20 22:56:05,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:56:05,705 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 816 transitions. [2021-11-20 22:56:05,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 2.611111111111111) internal successors, (47), 19 states have internal predecessors, (47), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 22:56:05,705 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 816 transitions. [2021-11-20 22:56:05,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 22:56:05,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:56:05,706 INFO L514 BasicCegarLoop]: trace histogram [35, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:56:05,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-20 22:56:05,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:56:05,921 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:56:05,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:56:05,921 INFO L85 PathProgramCache]: Analyzing trace with hash 980648363, now seen corresponding path program 1 times [2021-11-20 22:56:05,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:56:05,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996500581] [2021-11-20 22:56:05,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:05,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:56:05,932 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:56:05,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906954958] [2021-11-20 22:56:05,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:05,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:56:05,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:56:05,934 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:56:05,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 22:56:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:07,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-20 22:56:07,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:56:07,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-20 22:56:08,256 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 22:56:08,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2021-11-20 22:56:08,270 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:56:08,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-11-20 22:56:10,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-11-20 22:56:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 437 proven. 84 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2021-11-20 22:56:10,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:56:10,921 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:56:10,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996500581] [2021-11-20 22:56:10,921 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:56:10,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906954958] [2021-11-20 22:56:10,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906954958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:56:10,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1493034830] [2021-11-20 22:56:10,922 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2021-11-20 22:56:10,922 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:56:10,923 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:56:10,923 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:56:10,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:56:11,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:56:11,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:56:11,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:56:11,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:56:11,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:56:11,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:11,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 201 treesize of output 200 [2021-11-20 22:56:11,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:11,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 197 treesize of output 196 [2021-11-20 22:56:11,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:11,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 193 treesize of output 192 [2021-11-20 22:56:12,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:56:12,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:56:12,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:56:12,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:56:12,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:56:12,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:56:12,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:56:17,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 22:56:18,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:56:18,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:56:19,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:19,388 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:56:19,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 30 [2021-11-20 22:56:19,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:19,560 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:56:19,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 22:56:19,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:56:20,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:20,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:20,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:20,329 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:56:20,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 41 treesize of output 37 [2021-11-20 22:56:20,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:20,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:20,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:20,600 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:56:20,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-20 22:56:21,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:56:23,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:23,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:23,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:23,523 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-20 22:56:23,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 54 [2021-11-20 22:56:23,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:56:24,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:24,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:24,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:24,520 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-20 22:56:24,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 52 [2021-11-20 22:56:25,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:25,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:25,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:25,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:25,381 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-11-20 22:56:25,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 case distinctions, treesize of input 51 treesize of output 68 [2021-11-20 22:56:25,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:25,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:25,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:25,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:26,004 INFO L354 Elim1Store]: treesize reduction 48, result has 39.2 percent of original size [2021-11-20 22:56:26,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 case distinctions, treesize of input 60 treesize of output 67 [2021-11-20 22:56:26,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:56:29,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:29,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:29,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:29,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:29,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:29,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:29,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:29,388 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-11-20 22:56:29,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 64 treesize of output 87 [2021-11-20 22:56:29,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:56:30,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:30,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:30,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:30,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:30,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:30,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:30,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:30,113 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-11-20 22:56:30,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 73 treesize of output 84 [2021-11-20 22:56:30,527 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-20 22:56:30,551 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-20 22:56:30,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:56:30,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:56:30,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:56:31,229 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-20 22:56:31,545 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-20 22:56:31,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:56:31,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:56:32,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:56:32,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:56:32,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:56:32,597 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:56:32,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 182 [2021-11-20 22:56:32,637 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:56:32,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 185 [2021-11-20 22:56:32,676 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:56:32,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 188 [2021-11-20 22:56:33,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:56:33,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:56:33,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:56:34,178 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:56:50,495 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:56:50,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:56:50,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-20 22:56:50,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181212816] [2021-11-20 22:56:50,495 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 22:56:50,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 22:56:50,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:56:50,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 22:56:50,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=2660, Unknown=1, NotChecked=0, Total=2970 [2021-11-20 22:56:50,496 INFO L87 Difference]: Start difference. First operand 614 states and 816 transitions. Second operand has 17 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 22:56:53,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:56:53,354 INFO L93 Difference]: Finished difference Result 752 states and 1032 transitions. [2021-11-20 22:56:53,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 22:56:53,356 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 96 [2021-11-20 22:56:53,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:56:53,359 INFO L225 Difference]: With dead ends: 752 [2021-11-20 22:56:53,359 INFO L226 Difference]: Without dead ends: 716 [2021-11-20 22:56:53,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 148 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=367, Invalid=3792, Unknown=1, NotChecked=0, Total=4160 [2021-11-20 22:56:53,360 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 9 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:56:53,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 764 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 595 Invalid, 0 Unknown, 84 Unchecked, 1.0s Time] [2021-11-20 22:56:53,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-11-20 22:56:53,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 635. [2021-11-20 22:56:53,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 481 states have (on average 1.4033264033264032) internal successors, (675), 544 states have internal predecessors, (675), 83 states have call successors, (83), 10 states have call predecessors, (83), 14 states have return successors, (105), 80 states have call predecessors, (105), 83 states have call successors, (105) [2021-11-20 22:56:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 863 transitions. [2021-11-20 22:56:53,379 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 863 transitions. Word has length 96 [2021-11-20 22:56:53,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:56:53,379 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 863 transitions. [2021-11-20 22:56:53,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 22:56:53,380 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 863 transitions. [2021-11-20 22:56:53,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-20 22:56:53,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:56:53,381 INFO L514 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:56:53,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-20 22:56:53,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-20 22:56:53,603 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:56:53,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:56:53,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1378307572, now seen corresponding path program 2 times [2021-11-20 22:56:53,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:56:53,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983402911] [2021-11-20 22:56:53,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:53,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:56:53,619 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:56:53,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534832823] [2021-11-20 22:56:53,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 22:56:53,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:56:53,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:56:53,620 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:56:53,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 22:57:17,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 22:57:17,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:57:17,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-20 22:57:17,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:57:17,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-20 22:57:18,821 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 22:57:18,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2021-11-20 22:57:18,832 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:57:18,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-11-20 22:57:19,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-11-20 22:57:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 461 proven. 101 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2021-11-20 22:57:19,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:57:19,561 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:57:19,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983402911] [2021-11-20 22:57:19,561 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:57:19,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534832823] [2021-11-20 22:57:19,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534832823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:57:19,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1004486556] [2021-11-20 22:57:19,563 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2021-11-20 22:57:19,563 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:57:19,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:57:19,563 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:57:19,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:57:19,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:57:19,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:57:20,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:57:20,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:57:20,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:57:20,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:20,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 201 treesize of output 200 [2021-11-20 22:57:20,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:20,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 197 treesize of output 196 [2021-11-20 22:57:20,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:20,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 193 treesize of output 192 [2021-11-20 22:57:21,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:57:21,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:57:21,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:57:21,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:57:21,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:57:21,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:57:21,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:57:26,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:57:26,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 22:57:27,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:57:28,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:57:29,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:29,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:29,073 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:57:29,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 22:57:29,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:29,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:29,220 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:57:29,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 30 [2021-11-20 22:57:29,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:57:29,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:29,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:29,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:29,620 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:57:29,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-20 22:57:29,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:29,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:29,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:29,797 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:57:29,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 41 treesize of output 37 [2021-11-20 22:57:32,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:32,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:32,963 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-20 22:57:32,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 54 [2021-11-20 22:57:33,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:33,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:33,592 INFO L354 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2021-11-20 22:57:33,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 52 [2021-11-20 22:57:34,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:57:35,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:35,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:35,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:35,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:35,627 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-11-20 22:57:35,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 case distinctions, treesize of input 78 treesize of output 69 [2021-11-20 22:57:36,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:57:36,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:36,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:36,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:36,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:36,889 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-20 22:57:36,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 case distinctions, treesize of input 89 treesize of output 70 [2021-11-20 22:57:40,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:40,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:40,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:40,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:40,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:40,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:40,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:40,930 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-11-20 22:57:40,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 64 treesize of output 87 [2021-11-20 22:57:41,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:57:41,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:41,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:41,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:41,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:41,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:41,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:41,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:41,929 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-11-20 22:57:41,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 93 treesize of output 92 [2021-11-20 22:57:42,530 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-20 22:57:42,534 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-20 22:57:42,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:57:42,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:57:42,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:57:43,241 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-20 22:57:43,551 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 80 for LOIs [2021-11-20 22:57:43,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-20 22:57:43,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-20 22:57:44,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:57:44,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:57:44,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:57:44,679 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:57:44,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 182 [2021-11-20 22:57:44,770 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:57:44,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 185 [2021-11-20 22:57:44,812 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-20 22:57:44,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 188 [2021-11-20 22:57:45,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:57:45,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:57:46,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:57:46,446 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:58:05,120 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:58:05,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:58:05,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-20 22:58:05,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239682406] [2021-11-20 22:58:05,121 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 22:58:05,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 22:58:05,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:58:05,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 22:58:05,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2767, Unknown=0, NotChecked=0, Total=3080 [2021-11-20 22:58:05,122 INFO L87 Difference]: Start difference. First operand 635 states and 863 transitions. Second operand has 18 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 22:58:11,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:11,304 INFO L93 Difference]: Finished difference Result 777 states and 1087 transitions. [2021-11-20 22:58:11,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 22:58:11,306 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 97 [2021-11-20 22:58:11,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:11,313 INFO L225 Difference]: With dead ends: 777 [2021-11-20 22:58:11,313 INFO L226 Difference]: Without dead ends: 741 [2021-11-20 22:58:11,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 148 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=377, Invalid=4045, Unknown=0, NotChecked=0, Total=4422 [2021-11-20 22:58:11,315 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 9 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:11,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1093 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1134 Invalid, 0 Unknown, 179 Unchecked, 2.9s Time] [2021-11-20 22:58:11,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-11-20 22:58:11,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 639. [2021-11-20 22:58:11,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 485 states have (on average 1.4082474226804125) internal successors, (683), 548 states have internal predecessors, (683), 83 states have call successors, (83), 10 states have call predecessors, (83), 14 states have return successors, (105), 80 states have call predecessors, (105), 83 states have call successors, (105) [2021-11-20 22:58:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 871 transitions. [2021-11-20 22:58:11,338 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 871 transitions. Word has length 97 [2021-11-20 22:58:11,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:11,338 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 871 transitions. [2021-11-20 22:58:11,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 22:58:11,339 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 871 transitions. [2021-11-20 22:58:11,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 22:58:11,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:11,340 INFO L514 BasicCegarLoop]: trace histogram [37, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:11,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:11,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-20 22:58:11,559 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:58:11,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:11,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1491497525, now seen corresponding path program 3 times [2021-11-20 22:58:11,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:58:11,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103160428] [2021-11-20 22:58:11,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:11,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:58:11,567 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:58:11,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907354577] [2021-11-20 22:58:11,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 22:58:11,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:58:11,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:58:11,568 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:58:11,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e0eb9d-931e-467f-b6a1-f2dd7e798164/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-20 22:58:13,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 22:58:13,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:58:13,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 176 conjunts are in the unsatisfiable core [2021-11-20 22:58:13,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:13,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-20 22:58:13,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2021-11-20 22:58:15,375 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 22:58:15,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 22:58:15,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 26