./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/duplets.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/duplets.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur --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 ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:50:25,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:50:25,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:50:25,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:50:25,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:50:25,656 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:50:25,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:50:25,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:50:25,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:50:25,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:50:25,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:50:25,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:50:25,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:50:25,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:50:25,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:50:25,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:50:25,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:50:25,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:50:25,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:50:25,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:50:25,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:50:25,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:50:25,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:50:25,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:50:25,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:50:25,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:50:25,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:50:25,723 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:50:25,723 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:50:25,724 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:50:25,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:50:25,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:50:25,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:50:25,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:50:25,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:50:25,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:50:25,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:50:25,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:50:25,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:50:25,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:50:25,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:50:25,739 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-26 00:50:25,788 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:50:25,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:50:25,788 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:50:25,788 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:50:25,789 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:50:25,789 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:50:25,790 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:50:25,790 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:50:25,810 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:50:25,810 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:50:25,810 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:50:25,811 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:50:25,811 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:50:25,811 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:50:25,811 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:50:25,812 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:50:25,812 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:50:25,812 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:50:25,813 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:50:25,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:50:25,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:50:25,814 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:50:25,814 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:50:25,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:50:25,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:50:25,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:50:25,815 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:50:25,815 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:50:25,815 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:50:25,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:50:25,816 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:50:25,816 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:50:25,816 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:50:25,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:50:25,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:50:25,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:50:25,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:50:25,817 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:50:25,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:50:25,818 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:50:25,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:50:25,818 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:50:25,818 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 [2022-11-26 00:50:26,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:50:26,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:50:26,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:50:26,147 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:50:26,147 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:50:26,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/verifythis/duplets.c [2022-11-26 00:50:29,400 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:50:29,643 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:50:29,644 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/sv-benchmarks/c/verifythis/duplets.c [2022-11-26 00:50:29,651 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/data/80526fac6/ad45ab6e5a2a4f1f8569b1961b1268bc/FLAG589bb003f [2022-11-26 00:50:29,667 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/data/80526fac6/ad45ab6e5a2a4f1f8569b1961b1268bc [2022-11-26 00:50:29,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:50:29,671 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:50:29,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:50:29,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:50:29,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:50:29,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:50:29" (1/1) ... [2022-11-26 00:50:29,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8d9e728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:29, skipping insertion in model container [2022-11-26 00:50:29,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:50:29" (1/1) ... [2022-11-26 00:50:29,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:50:29,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:50:29,845 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/sv-benchmarks/c/verifythis/duplets.c[485,498] [2022-11-26 00:50:29,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:50:29,880 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:50:29,892 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/sv-benchmarks/c/verifythis/duplets.c[485,498] [2022-11-26 00:50:29,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:50:29,919 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:50:29,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:29 WrapperNode [2022-11-26 00:50:29,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:50:29,921 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:50:29,921 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:50:29,921 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:50:29,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:29" (1/1) ... [2022-11-26 00:50:29,937 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:29" (1/1) ... [2022-11-26 00:50:29,978 INFO L138 Inliner]: procedures = 21, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 123 [2022-11-26 00:50:29,978 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:50:29,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:50:29,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:50:29,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:50:29,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:29" (1/1) ... [2022-11-26 00:50:29,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:29" (1/1) ... [2022-11-26 00:50:30,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:29" (1/1) ... [2022-11-26 00:50:30,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:29" (1/1) ... [2022-11-26 00:50:30,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:29" (1/1) ... [2022-11-26 00:50:30,033 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:29" (1/1) ... [2022-11-26 00:50:30,041 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:29" (1/1) ... [2022-11-26 00:50:30,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:29" (1/1) ... [2022-11-26 00:50:30,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:50:30,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:50:30,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:50:30,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:50:30,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:29" (1/1) ... [2022-11-26 00:50:30,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:50:30,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:50:30,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:50:30,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:50:30,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:50:30,150 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 00:50:30,151 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 00:50:30,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:50:30,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:50:30,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:50:30,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:50:30,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:50:30,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:50:30,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:50:30,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 00:50:30,153 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 00:50:30,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:50:30,280 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:50:30,283 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:50:30,809 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:50:30,863 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:50:30,864 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-26 00:50:30,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:50:30 BoogieIcfgContainer [2022-11-26 00:50:30,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:50:30,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:50:30,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:50:30,874 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:50:30,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:50:29" (1/3) ... [2022-11-26 00:50:30,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f62797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:50:30, skipping insertion in model container [2022-11-26 00:50:30,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:29" (2/3) ... [2022-11-26 00:50:30,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f62797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:50:30, skipping insertion in model container [2022-11-26 00:50:30,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:50:30" (3/3) ... [2022-11-26 00:50:30,878 INFO L112 eAbstractionObserver]: Analyzing ICFG duplets.c [2022-11-26 00:50:30,900 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:50:30,901 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2022-11-26 00:50:30,955 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:50:30,963 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@d40f350, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:50:30,964 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2022-11-26 00:50:30,969 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 75 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-26 00:50:30,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:50:30,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:50:30,978 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:50:30,979 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:50:30,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:50:30,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1311551543, now seen corresponding path program 1 times [2022-11-26 00:50:30,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:50:30,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856592101] [2022-11-26 00:50:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:30,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:50:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:50:31,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:50:31,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:50:31,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856592101] [2022-11-26 00:50:31,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856592101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:50:31,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:50:31,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:50:31,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026508788] [2022-11-26 00:50:31,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:50:31,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:50:31,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:50:31,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:50:31,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:50:31,591 INFO L87 Difference]: Start difference. First operand has 87 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 75 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:50:31,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:50:31,744 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2022-11-26 00:50:31,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:50:31,747 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), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 16 [2022-11-26 00:50:31,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:50:31,755 INFO L225 Difference]: With dead ends: 85 [2022-11-26 00:50:31,755 INFO L226 Difference]: Without dead ends: 84 [2022-11-26 00:50:31,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:50:31,770 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 65 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:50:31,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 62 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:50:31,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-26 00:50:31,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-11-26 00:50:31,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 38 states have (on average 2.026315789473684) internal successors, (77), 72 states have internal predecessors, (77), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-26 00:50:31,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2022-11-26 00:50:31,839 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 16 [2022-11-26 00:50:31,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:50:31,841 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2022-11-26 00:50:31,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:50:31,842 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2022-11-26 00:50:31,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:50:31,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:50:31,843 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:50:31,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:50:31,844 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:50:31,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:50:31,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1311551544, now seen corresponding path program 1 times [2022-11-26 00:50:31,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:50:31,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537155503] [2022-11-26 00:50:31,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:31,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:50:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:50:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:50:32,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:50:32,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537155503] [2022-11-26 00:50:32,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537155503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:50:32,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23127778] [2022-11-26 00:50:32,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:32,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:50:32,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:50:32,290 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:50:32,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:50:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:50:32,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-26 00:50:32,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:50:32,581 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:50:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:50:32,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:50:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:50:33,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23127778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:50:33,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1369226552] [2022-11-26 00:50:33,373 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:50:33,373 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:50:33,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:50:33,384 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:50:33,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:50:33,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:33,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 00:50:33,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:33,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:33,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:33,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:50:33,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:33,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:33,691 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:33,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:33,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:33,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:33,822 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:33,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:34,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:34,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:34,044 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:34,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:34,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:34,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:34,174 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:34,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:34,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:34,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:34,414 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:34,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:34,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:34,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:34,545 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:34,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:34,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:34,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:34,777 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:34,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:34,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:34,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:34,881 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:34,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:34,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:34,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:34,982 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:34,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:35,023 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:50:35,043 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:50:37,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1369226552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:50:37,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:50:37,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 8, 5] total 22 [2022-11-26 00:50:37,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126255913] [2022-11-26 00:50:37,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:50:37,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 00:50:37,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:50:37,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 00:50:37,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-11-26 00:50:37,490 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 11 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:50:38,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:50:38,042 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2022-11-26 00:50:38,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:50:38,042 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 16 [2022-11-26 00:50:38,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:50:38,044 INFO L225 Difference]: With dead ends: 83 [2022-11-26 00:50:38,044 INFO L226 Difference]: Without dead ends: 83 [2022-11-26 00:50:38,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-11-26 00:50:38,045 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 82 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:50:38,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 193 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:50:38,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-26 00:50:38,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-26 00:50:38,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 38 states have (on average 2.0) internal successors, (76), 71 states have internal predecessors, (76), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-26 00:50:38,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2022-11-26 00:50:38,063 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 16 [2022-11-26 00:50:38,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:50:38,064 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2022-11-26 00:50:38,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:50:38,064 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2022-11-26 00:50:38,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 00:50:38,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:50:38,065 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:50:38,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:50:38,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:50:38,271 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:50:38,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:50:38,271 INFO L85 PathProgramCache]: Analyzing trace with hash 2003392154, now seen corresponding path program 1 times [2022-11-26 00:50:38,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:50:38,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731437107] [2022-11-26 00:50:38,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:38,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:50:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:50:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:50:38,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:50:38,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731437107] [2022-11-26 00:50:38,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731437107] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:50:38,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37575546] [2022-11-26 00:50:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:38,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:50:38,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:50:38,579 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:50:38,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:50:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:50:38,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-26 00:50:38,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:50:38,693 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:50:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:50:39,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:50:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:50:39,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37575546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:50:39,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1127650023] [2022-11-26 00:50:39,865 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:50:39,865 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:50:39,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:50:39,866 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:50:39,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:50:39,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:39,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:39,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:39,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:50:39,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:39,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 00:50:40,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:40,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:40,048 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:40,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:40,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:40,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:40,121 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:40,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:40,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:40,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:40,256 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:40,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:40,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:40,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:40,353 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:40,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:40,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:40,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:40,546 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:40,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:40,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:40,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:40,643 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:40,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:40,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:50:40,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:40,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-26 00:50:40,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:40,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:40,900 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:40,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:40,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:40,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:40,999 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:41,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:41,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:41,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:41,070 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:41,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:41,100 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:50:41,117 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:50:43,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1127650023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:50:43,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:50:43,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 8, 7] total 26 [2022-11-26 00:50:43,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753964063] [2022-11-26 00:50:43,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:50:43,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:50:43,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:50:43,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:50:43,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:50:43,851 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 12 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:50:44,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:50:44,641 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2022-11-26 00:50:44,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:50:44,642 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2022-11-26 00:50:44,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:50:44,643 INFO L225 Difference]: With dead ends: 82 [2022-11-26 00:50:44,643 INFO L226 Difference]: Without dead ends: 82 [2022-11-26 00:50:44,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:50:44,645 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 80 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:50:44,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 205 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:50:44,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-26 00:50:44,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-11-26 00:50:44,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 70 states have internal predecessors, (75), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-26 00:50:44,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2022-11-26 00:50:44,652 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 17 [2022-11-26 00:50:44,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:50:44,653 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2022-11-26 00:50:44,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:50:44,653 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2022-11-26 00:50:44,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:50:44,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:50:44,654 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:50:44,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:50:44,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:50:44,860 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:50:44,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:50:44,861 INFO L85 PathProgramCache]: Analyzing trace with hash 194668906, now seen corresponding path program 1 times [2022-11-26 00:50:44,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:50:44,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391705505] [2022-11-26 00:50:44,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:44,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:50:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:50:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:50:45,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:50:45,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391705505] [2022-11-26 00:50:45,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391705505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:50:45,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:50:45,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:50:45,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915125896] [2022-11-26 00:50:45,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:50:45,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:50:45,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:50:45,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:50:45,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:50:45,060 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:50:45,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:50:45,175 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2022-11-26 00:50:45,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:50:45,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2022-11-26 00:50:45,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:50:45,176 INFO L225 Difference]: With dead ends: 77 [2022-11-26 00:50:45,176 INFO L226 Difference]: Without dead ends: 77 [2022-11-26 00:50:45,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:50:45,177 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 112 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:50:45,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 64 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:50:45,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-26 00:50:45,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-26 00:50:45,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 65 states have internal predecessors, (70), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-26 00:50:45,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2022-11-26 00:50:45,184 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 20 [2022-11-26 00:50:45,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:50:45,184 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2022-11-26 00:50:45,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:50:45,185 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2022-11-26 00:50:45,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:50:45,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:50:45,185 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:50:45,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:50:45,186 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:50:45,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:50:45,186 INFO L85 PathProgramCache]: Analyzing trace with hash 194668907, now seen corresponding path program 1 times [2022-11-26 00:50:45,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:50:45,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810559828] [2022-11-26 00:50:45,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:45,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:50:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:50:45,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:50:45,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:50:45,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810559828] [2022-11-26 00:50:45,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810559828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:50:45,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:50:45,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:50:45,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76969435] [2022-11-26 00:50:45,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:50:45,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:50:45,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:50:45,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:50:45,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:50:45,418 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:50:45,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:50:45,644 INFO L93 Difference]: Finished difference Result 134 states and 154 transitions. [2022-11-26 00:50:45,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:50:45,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2022-11-26 00:50:45,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:50:45,646 INFO L225 Difference]: With dead ends: 134 [2022-11-26 00:50:45,646 INFO L226 Difference]: Without dead ends: 134 [2022-11-26 00:50:45,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:50:45,647 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 169 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:50:45,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 93 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:50:45,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-26 00:50:45,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 81. [2022-11-26 00:50:45,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 43 states have (on average 1.813953488372093) internal successors, (78), 69 states have internal predecessors, (78), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-26 00:50:45,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2022-11-26 00:50:45,654 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 20 [2022-11-26 00:50:45,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:50:45,655 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2022-11-26 00:50:45,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:50:45,655 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2022-11-26 00:50:45,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:50:45,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:50:45,656 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:50:45,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:50:45,656 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:50:45,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:50:45,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1739768799, now seen corresponding path program 1 times [2022-11-26 00:50:45,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:50:45,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854454194] [2022-11-26 00:50:45,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:45,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:50:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:50:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:50:46,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:50:46,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854454194] [2022-11-26 00:50:46,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854454194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:50:46,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:50:46,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:50:46,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104459590] [2022-11-26 00:50:46,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:50:46,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:50:46,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:50:46,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:50:46,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:50:46,297 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:50:47,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:50:47,680 INFO L93 Difference]: Finished difference Result 237 states and 272 transitions. [2022-11-26 00:50:47,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:50:47,681 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2022-11-26 00:50:47,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:50:47,682 INFO L225 Difference]: With dead ends: 237 [2022-11-26 00:50:47,683 INFO L226 Difference]: Without dead ends: 237 [2022-11-26 00:50:47,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:50:47,684 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 533 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:50:47,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 195 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:50:47,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-26 00:50:47,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 84. [2022-11-26 00:50:47,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 72 states have internal predecessors, (82), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-26 00:50:47,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2022-11-26 00:50:47,693 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 21 [2022-11-26 00:50:47,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:50:47,693 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2022-11-26 00:50:47,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:50:47,694 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2022-11-26 00:50:47,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 00:50:47,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:50:47,695 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:50:47,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:50:47,695 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:50:47,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:50:47,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1292239534, now seen corresponding path program 1 times [2022-11-26 00:50:47,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:50:47,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091718394] [2022-11-26 00:50:47,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:47,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:50:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:50:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:50:47,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:50:47,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091718394] [2022-11-26 00:50:47,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091718394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:50:47,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87032590] [2022-11-26 00:50:47,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:47,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:50:47,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:50:47,822 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:50:47,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:50:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:50:47,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:50:47,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:50:47,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:50:47,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:50:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:50:48,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87032590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:50:48,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1557199205] [2022-11-26 00:50:48,084 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:50:48,085 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:50:48,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:50:48,085 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:50:48,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:50:48,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:48,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 00:50:48,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:48,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:48,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:48,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:50:48,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:48,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:48,231 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:48,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:48,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:48,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:48,301 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:48,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:48,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:48,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:48,432 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:48,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:48,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:48,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:48,556 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:48,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:48,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:48,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:48,766 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:48,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:48,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:48,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:48,861 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:48,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:48,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:50:49,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:49,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-26 00:50:49,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:50:49,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:49,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:49,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:49,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:49,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:49,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:49,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:49,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:49,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:49,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:49,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:49,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:49,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-26 00:50:49,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:50:49,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:49,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-26 00:50:49,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:49,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:49,293 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:49,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:49,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:49,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:49,369 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:49,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:49,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:49,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:49,435 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:50:49,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:50:49,465 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:50:49,481 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:50:52,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1557199205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:50:52,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:50:52,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 6, 6] total 20 [2022-11-26 00:50:52,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108618966] [2022-11-26 00:50:52,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:50:52,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:50:52,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:50:52,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:50:52,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:50:52,877 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:50:54,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:50:54,672 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2022-11-26 00:50:54,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:50:54,672 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 23 [2022-11-26 00:50:54,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:50:54,673 INFO L225 Difference]: With dead ends: 115 [2022-11-26 00:50:54,674 INFO L226 Difference]: Without dead ends: 110 [2022-11-26 00:50:54,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:50:54,675 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 104 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:50:54,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 248 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-26 00:50:54,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-26 00:50:54,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2022-11-26 00:50:54,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 64 states have (on average 1.609375) internal successors, (103), 91 states have internal predecessors, (103), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-26 00:50:54,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2022-11-26 00:50:54,683 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 23 [2022-11-26 00:50:54,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:50:54,683 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2022-11-26 00:50:54,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:50:54,683 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2022-11-26 00:50:54,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-26 00:50:54,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:50:54,684 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:50:54,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:50:54,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 00:50:54,891 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:50:54,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:50:54,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1897490764, now seen corresponding path program 1 times [2022-11-26 00:50:54,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:50:54,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611950183] [2022-11-26 00:50:54,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:54,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:50:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:50:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:50:54,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:50:54,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611950183] [2022-11-26 00:50:54,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611950183] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:50:54,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104772636] [2022-11-26 00:50:54,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:54,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:50:54,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:50:54,959 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:50:54,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:50:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:50:55,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:50:55,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:50:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:50:55,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:50:55,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104772636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:50:55,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:50:55,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-11-26 00:50:55,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684636807] [2022-11-26 00:50:55,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:50:55,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:50:55,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:50:55,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:50:55,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:50:55,054 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:50:55,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:50:55,160 INFO L93 Difference]: Finished difference Result 282 states and 334 transitions. [2022-11-26 00:50:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:50:55,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 22 [2022-11-26 00:50:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:50:55,162 INFO L225 Difference]: With dead ends: 282 [2022-11-26 00:50:55,162 INFO L226 Difference]: Without dead ends: 282 [2022-11-26 00:50:55,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:50:55,163 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 182 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:50:55,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 264 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:50:55,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-26 00:50:55,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 109. [2022-11-26 00:50:55,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 66 states have (on average 1.606060606060606) internal successors, (106), 93 states have internal predecessors, (106), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-26 00:50:55,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2022-11-26 00:50:55,173 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 22 [2022-11-26 00:50:55,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:50:55,174 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2022-11-26 00:50:55,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:50:55,174 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2022-11-26 00:50:55,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 00:50:55,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:50:55,175 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:50:55,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:50:55,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-26 00:50:55,387 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:50:55,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:50:55,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1966086971, now seen corresponding path program 1 times [2022-11-26 00:50:55,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:50:55,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361010941] [2022-11-26 00:50:55,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:55,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:50:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:50:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:50:56,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:50:56,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361010941] [2022-11-26 00:50:56,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361010941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:50:56,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:50:56,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-26 00:50:56,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38653356] [2022-11-26 00:50:56,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:50:56,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 00:50:56,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:50:56,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 00:50:56,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:50:56,102 INFO L87 Difference]: Start difference. First operand 109 states and 133 transitions. Second operand has 10 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 8 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:50:56,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:50:56,705 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2022-11-26 00:50:56,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:50:56,706 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 8 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2022-11-26 00:50:56,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:50:56,707 INFO L225 Difference]: With dead ends: 112 [2022-11-26 00:50:56,708 INFO L226 Difference]: Without dead ends: 112 [2022-11-26 00:50:56,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:50:56,709 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 312 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:50:56,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 213 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:50:56,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-26 00:50:56,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-11-26 00:50:56,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 66 states have (on average 1.5909090909090908) internal successors, (105), 93 states have internal predecessors, (105), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-26 00:50:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2022-11-26 00:50:56,715 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 25 [2022-11-26 00:50:56,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:50:56,715 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2022-11-26 00:50:56,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 8 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:50:56,716 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2022-11-26 00:50:56,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 00:50:56,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:50:56,717 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:50:56,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:50:56,717 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:50:56,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:50:56,718 INFO L85 PathProgramCache]: Analyzing trace with hash 118458110, now seen corresponding path program 1 times [2022-11-26 00:50:56,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:50:56,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436489027] [2022-11-26 00:50:56,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:56,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:50:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:50:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:50:57,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:50:57,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436489027] [2022-11-26 00:50:57,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436489027] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:50:57,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304523258] [2022-11-26 00:50:57,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:57,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:50:57,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:50:57,184 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:50:57,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:50:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:50:57,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-26 00:50:57,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:50:57,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:50:57,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-26 00:50:57,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:57,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:57,755 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:50:57,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-26 00:50:57,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-26 00:50:58,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-11-26 00:50:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:50:58,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:50:58,758 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:50:58,758 INFO L350 Elim1Store]: Elim1 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 89 treesize of output 91 [2022-11-26 00:51:00,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304523258] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:51:00,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [178954214] [2022-11-26 00:51:00,232 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:51:00,232 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:51:00,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:51:00,233 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:51:00,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:51:00,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:00,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:00,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:00,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:51:00,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:00,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 00:51:00,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:00,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:00,370 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:00,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:00,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:00,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:00,440 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:00,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:00,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:00,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:00,579 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:00,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:00,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:00,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:00,673 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:00,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:00,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:00,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:00,827 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:00,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:00,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:00,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:00,921 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:00,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:01,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:51:01,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:01,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-26 00:51:01,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:51:01,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:01,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:01,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:01,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:01,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:01,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:01,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:01,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:01,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:01,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:01,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:01,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:01,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-26 00:51:01,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:01,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-26 00:51:02,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:02,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:02,206 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:02,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:02,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:02,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:02,278 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:02,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:02,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:02,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:02,354 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:02,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:02,384 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:51:02,398 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:51:11,297 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2767#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|)) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (not (<= (+ (* |ULTIMATE.start_finddup_~j~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|))) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (= (select (select |#memory_int| |ULTIMATE.start_finddup_~a#1.base|) (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) |ULTIMATE.start_finddup_#t~mem10#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_finddup_~i~1#1| 0) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (= (select |#valid| |ULTIMATE.start_finddup_~a#1.base|) 1) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= 1 |ULTIMATE.start_finddup_~n#1|) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (<= 0 (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-26 00:51:11,297 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:51:11,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:51:11,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-11-26 00:51:11,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502504978] [2022-11-26 00:51:11,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:51:11,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 00:51:11,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:11,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 00:51:11,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1784, Unknown=0, NotChecked=0, Total=1980 [2022-11-26 00:51:11,300 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 21 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-26 00:51:14,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:14,584 INFO L93 Difference]: Finished difference Result 213 states and 254 transitions. [2022-11-26 00:51:14,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:51:14,585 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 25 [2022-11-26 00:51:14,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:14,586 INFO L225 Difference]: With dead ends: 213 [2022-11-26 00:51:14,587 INFO L226 Difference]: Without dead ends: 213 [2022-11-26 00:51:14,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=380, Invalid=3042, Unknown=0, NotChecked=0, Total=3422 [2022-11-26 00:51:14,588 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 459 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:14,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 576 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-26 00:51:14,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-26 00:51:14,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 108. [2022-11-26 00:51:14,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 65 states have (on average 1.5692307692307692) internal successors, (102), 91 states have internal predecessors, (102), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-26 00:51:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2022-11-26 00:51:14,596 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 25 [2022-11-26 00:51:14,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:14,596 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2022-11-26 00:51:14,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-26 00:51:14,596 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2022-11-26 00:51:14,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-26 00:51:14,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:14,597 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:51:14,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:51:14,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:51:14,803 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:51:14,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:14,804 INFO L85 PathProgramCache]: Analyzing trace with hash -618514571, now seen corresponding path program 1 times [2022-11-26 00:51:14,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:14,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408685927] [2022-11-26 00:51:14,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:14,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:51:14,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:14,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408685927] [2022-11-26 00:51:14,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408685927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:51:14,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745574661] [2022-11-26 00:51:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:14,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:51:14,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:51:14,882 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:51:14,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:51:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:14,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:51:14,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:51:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:51:15,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:51:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:51:15,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745574661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:51:15,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1388100381] [2022-11-26 00:51:15,052 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:51:15,052 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:51:15,053 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:51:15,053 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:51:15,053 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:51:15,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:51:15,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 00:51:15,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,182 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:15,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:15,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,254 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:15,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:15,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,376 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:15,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:15,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,462 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:15,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:15,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,613 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:15,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:15,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,703 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:15,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:15,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:51:15,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-26 00:51:15,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:51:15,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-26 00:51:15,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:51:15,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:15,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-26 00:51:18,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:18,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:18,300 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:18,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:18,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:18,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:18,373 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:18,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:18,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:18,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:18,456 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:18,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:18,490 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:51:18,509 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:51:24,958 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3288#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~a#1.offset|) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (<= 1 |ULTIMATE.start_finddup_~j~1#1|) (<= 0 |ULTIMATE.start_finddup_~i~1#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= 1 |ULTIMATE.start_finddup_~n#1|) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|))) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-26 00:51:24,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:51:24,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:51:24,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-11-26 00:51:24,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606772475] [2022-11-26 00:51:24,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:51:24,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:51:24,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:24,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:51:24,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:51:24,960 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:51:25,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:25,144 INFO L93 Difference]: Finished difference Result 366 states and 434 transitions. [2022-11-26 00:51:25,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:51:25,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 26 [2022-11-26 00:51:25,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:25,155 INFO L225 Difference]: With dead ends: 366 [2022-11-26 00:51:25,155 INFO L226 Difference]: Without dead ends: 366 [2022-11-26 00:51:25,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:51:25,156 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 294 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:25,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 512 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:51:25,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-11-26 00:51:25,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 118. [2022-11-26 00:51:25,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 75 states have (on average 1.5866666666666667) internal successors, (119), 101 states have internal predecessors, (119), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-26 00:51:25,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 146 transitions. [2022-11-26 00:51:25,172 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 146 transitions. Word has length 26 [2022-11-26 00:51:25,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:25,177 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 146 transitions. [2022-11-26 00:51:25,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:51:25,177 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 146 transitions. [2022-11-26 00:51:25,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-26 00:51:25,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:25,180 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-26 00:51:25,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:51:25,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:51:25,387 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:51:25,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:25,387 INFO L85 PathProgramCache]: Analyzing trace with hash -641204124, now seen corresponding path program 1 times [2022-11-26 00:51:25,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:25,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920127513] [2022-11-26 00:51:25,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:25,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:51:25,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:25,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920127513] [2022-11-26 00:51:25,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920127513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:51:25,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123960268] [2022-11-26 00:51:25,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:25,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:51:25,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:51:25,460 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:51:25,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:51:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:25,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:51:25,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:51:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:51:25,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:51:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:51:25,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123960268] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:51:25,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [917905295] [2022-11-26 00:51:25,599 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-26 00:51:25,599 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:51:25,599 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:51:25,599 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:51:25,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:51:25,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:25,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 00:51:25,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:25,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:25,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:25,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:51:25,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:25,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:25,725 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:25,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:25,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:25,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:25,792 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:25,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:25,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:25,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:25,903 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:25,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:25,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:25,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:25,992 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:25,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:26,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:26,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:26,142 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:26,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:26,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:26,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:26,234 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:26,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:26,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:51:26,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:26,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-26 00:51:26,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:51:26,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:26,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-26 00:51:26,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:51:26,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:26,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:26,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:26,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:26,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:26,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:26,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:26,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:26,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:26,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:26,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:26,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:26,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-26 00:51:28,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:28,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:28,622 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:28,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:28,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:28,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:28,689 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:28,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:28,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:28,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:28,752 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:28,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:28,778 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2022-11-26 00:51:28,782 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:51:28,795 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:51:35,359 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3965#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:51:35,359 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:51:35,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:51:35,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-11-26 00:51:35,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816380840] [2022-11-26 00:51:35,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:51:35,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:51:35,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:35,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:51:35,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:51:35,361 INFO L87 Difference]: Start difference. First operand 118 states and 146 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:51:35,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:35,454 INFO L93 Difference]: Finished difference Result 163 states and 195 transitions. [2022-11-26 00:51:35,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:51:35,455 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-11-26 00:51:35,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:35,456 INFO L225 Difference]: With dead ends: 163 [2022-11-26 00:51:35,456 INFO L226 Difference]: Without dead ends: 163 [2022-11-26 00:51:35,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-11-26 00:51:35,457 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 103 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:35,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 259 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:51:35,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-26 00:51:35,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2022-11-26 00:51:35,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 75 states have (on average 1.56) internal successors, (117), 101 states have internal predecessors, (117), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-26 00:51:35,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 144 transitions. [2022-11-26 00:51:35,463 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 144 transitions. Word has length 29 [2022-11-26 00:51:35,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:35,463 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 144 transitions. [2022-11-26 00:51:35,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:51:35,463 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 144 transitions. [2022-11-26 00:51:35,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-26 00:51:35,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:35,464 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-26 00:51:35,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:51:35,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 00:51:35,670 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:51:35,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:35,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1790809280, now seen corresponding path program 1 times [2022-11-26 00:51:35,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:35,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51308535] [2022-11-26 00:51:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:35,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:51:35,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:35,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51308535] [2022-11-26 00:51:35,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51308535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:51:35,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:51:35,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:51:35,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245295335] [2022-11-26 00:51:35,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:51:35,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:51:35,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:35,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:51:35,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:51:35,737 INFO L87 Difference]: Start difference. First operand 118 states and 144 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:51:35,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:35,845 INFO L93 Difference]: Finished difference Result 167 states and 198 transitions. [2022-11-26 00:51:35,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:51:35,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-11-26 00:51:35,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:35,846 INFO L225 Difference]: With dead ends: 167 [2022-11-26 00:51:35,847 INFO L226 Difference]: Without dead ends: 167 [2022-11-26 00:51:35,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:51:35,850 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 86 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:35,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 473 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:51:35,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-26 00:51:35,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 124. [2022-11-26 00:51:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 79 states have (on average 1.5316455696202531) internal successors, (121), 106 states have internal predecessors, (121), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:51:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 150 transitions. [2022-11-26 00:51:35,856 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 150 transitions. Word has length 29 [2022-11-26 00:51:35,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:35,857 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 150 transitions. [2022-11-26 00:51:35,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:51:35,857 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 150 transitions. [2022-11-26 00:51:35,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-26 00:51:35,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:35,858 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:51:35,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 00:51:35,859 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:51:35,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:35,859 INFO L85 PathProgramCache]: Analyzing trace with hash -284603141, now seen corresponding path program 2 times [2022-11-26 00:51:35,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:35,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755915964] [2022-11-26 00:51:35,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:35,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:36,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:51:36,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:36,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755915964] [2022-11-26 00:51:36,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755915964] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:51:36,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80050206] [2022-11-26 00:51:36,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:51:36,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:51:36,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:51:36,912 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:51:36,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:51:37,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:51:37,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:51:37,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-26 00:51:37,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:51:37,042 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:51:37,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-26 00:51:37,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:37,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-26 00:51:37,472 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 22 [2022-11-26 00:51:37,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:37,801 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:51:37,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 62 [2022-11-26 00:51:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:51:38,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:51:40,543 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:51:40,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 409 treesize of output 369 [2022-11-26 00:51:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:51:42,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80050206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:51:42,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [442658698] [2022-11-26 00:51:42,278 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-26 00:51:42,278 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:51:42,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:51:42,278 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:51:42,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:51:42,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:42,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 00:51:42,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:42,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:42,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:42,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:51:42,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:42,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:42,409 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:42,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:42,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:42,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:42,475 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:42,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:42,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:42,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:42,602 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:42,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:42,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:42,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:42,707 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:42,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:42,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:42,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:42,856 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:42,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:42,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:42,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:42,949 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:42,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:43,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:51:43,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:43,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-26 00:51:43,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:51:43,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:43,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-26 00:51:43,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:51:43,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:43,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:43,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:43,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:43,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:43,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:43,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:43,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:43,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:43,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:43,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:43,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:43,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-26 00:51:45,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:45,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:45,478 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:45,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:45,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:45,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:45,549 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:45,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:45,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:45,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:45,617 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:51:45,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:51:45,642 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2022-11-26 00:51:45,646 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:51:45,660 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:51:55,843 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4785#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:51:55,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:51:55,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:51:55,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 13] total 35 [2022-11-26 00:51:55,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970473084] [2022-11-26 00:51:55,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:51:55,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-26 00:51:55,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:55,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-26 00:51:55,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2601, Unknown=2, NotChecked=0, Total=2862 [2022-11-26 00:51:55,847 INFO L87 Difference]: Start difference. First operand 124 states and 150 transitions. Second operand has 35 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 35 states have internal predecessors, (49), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-26 00:51:59,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:59,641 INFO L93 Difference]: Finished difference Result 323 states and 382 transitions. [2022-11-26 00:51:59,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 00:51:59,642 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 35 states have internal predecessors, (49), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) Word has length 31 [2022-11-26 00:51:59,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:59,644 INFO L225 Difference]: With dead ends: 323 [2022-11-26 00:51:59,644 INFO L226 Difference]: Without dead ends: 322 [2022-11-26 00:51:59,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=602, Invalid=4226, Unknown=2, NotChecked=0, Total=4830 [2022-11-26 00:51:59,646 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 1437 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 2376 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1438 SdHoareTripleChecker+Valid, 1457 SdHoareTripleChecker+Invalid, 2598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 2376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:59,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1438 Valid, 1457 Invalid, 2598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 2376 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-26 00:51:59,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-11-26 00:51:59,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 126. [2022-11-26 00:51:59,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 81 states have (on average 1.5061728395061729) internal successors, (122), 108 states have internal predecessors, (122), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:51:59,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 151 transitions. [2022-11-26 00:51:59,656 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 151 transitions. Word has length 31 [2022-11-26 00:51:59,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:59,656 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 151 transitions. [2022-11-26 00:51:59,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 35 states have internal predecessors, (49), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-26 00:51:59,657 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 151 transitions. [2022-11-26 00:51:59,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-26 00:51:59,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:59,658 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:51:59,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:51:59,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:51:59,863 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:51:59,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:59,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1798148022, now seen corresponding path program 2 times [2022-11-26 00:51:59,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:59,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260381546] [2022-11-26 00:51:59,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:59,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:52:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:52:00,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:52:00,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260381546] [2022-11-26 00:52:00,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260381546] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:52:00,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312295043] [2022-11-26 00:52:00,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:52:00,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:52:00,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:52:00,028 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:52:00,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:52:00,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:52:00,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:52:00,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:52:00,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:52:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:52:00,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:52:00,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:52:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:52:00,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312295043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:52:00,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [373639229] [2022-11-26 00:52:00,508 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:52:00,508 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:52:00,508 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:52:00,508 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:52:00,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:52:00,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:00,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:00,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:00,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:52:00,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:00,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 00:52:00,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:00,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:00,659 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:00,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:00,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:00,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:00,723 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:00,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:00,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:00,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:00,844 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:00,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:00,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:00,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:00,931 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:00,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:01,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:01,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:01,067 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:01,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:01,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:01,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:01,147 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:01,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:01,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:01,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:01,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-26 00:52:01,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:01,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:01,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-26 00:52:01,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:01,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:01,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:01,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:01,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:01,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:01,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:01,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:01,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:01,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:01,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:01,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:01,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:01,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-26 00:52:03,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:03,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:03,411 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:03,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:03,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:03,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:03,500 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:03,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:03,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:03,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:03,565 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:03,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:03,591 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:52:03,605 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:52:10,434 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5479#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~a#1.offset|) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (<= 1 |ULTIMATE.start_finddup_~j~1#1|) (<= 0 |ULTIMATE.start_finddup_~i~1#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= 1 |ULTIMATE.start_finddup_~n#1|) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|))) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-26 00:52:10,434 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:52:10,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:52:10,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-11-26 00:52:10,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88614163] [2022-11-26 00:52:10,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:52:10,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:52:10,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:52:10,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:52:10,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:52:10,436 INFO L87 Difference]: Start difference. First operand 126 states and 151 transitions. Second operand has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-26 00:52:11,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:52:11,420 INFO L93 Difference]: Finished difference Result 259 states and 303 transitions. [2022-11-26 00:52:11,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:52:11,420 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 30 [2022-11-26 00:52:11,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:52:11,422 INFO L225 Difference]: With dead ends: 259 [2022-11-26 00:52:11,422 INFO L226 Difference]: Without dead ends: 259 [2022-11-26 00:52:11,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=391, Invalid=1865, Unknown=0, NotChecked=0, Total=2256 [2022-11-26 00:52:11,423 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 907 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:52:11,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 460 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:52:11,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-26 00:52:11,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 125. [2022-11-26 00:52:11,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 81 states have (on average 1.4814814814814814) internal successors, (120), 107 states have internal predecessors, (120), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:52:11,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 149 transitions. [2022-11-26 00:52:11,430 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 149 transitions. Word has length 30 [2022-11-26 00:52:11,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:52:11,431 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 149 transitions. [2022-11-26 00:52:11,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-26 00:52:11,431 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 149 transitions. [2022-11-26 00:52:11,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-26 00:52:11,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:52:11,432 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:52:11,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:52:11,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 00:52:11,638 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:52:11,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:52:11,638 INFO L85 PathProgramCache]: Analyzing trace with hash -91986188, now seen corresponding path program 1 times [2022-11-26 00:52:11,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:52:11,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883647736] [2022-11-26 00:52:11,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:52:11,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:52:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:52:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:52:11,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:52:11,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883647736] [2022-11-26 00:52:11,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883647736] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:52:11,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068231091] [2022-11-26 00:52:11,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:52:11,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:52:11,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:52:11,835 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:52:11,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:52:11,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:52:11,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:52:11,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:52:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:52:12,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:52:12,235 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 27 [2022-11-26 00:52:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:52:12,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068231091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:52:12,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [640101972] [2022-11-26 00:52:12,354 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:52:12,354 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:52:12,355 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:52:12,355 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:52:12,355 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:52:12,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:12,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:12,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:12,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:52:12,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:12,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 00:52:12,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:12,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:12,485 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:12,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:12,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:12,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:12,544 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:12,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:12,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:12,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:12,658 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:12,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:12,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:12,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:12,732 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:12,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:12,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:12,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:12,854 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:12,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:12,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:12,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:12,929 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:12,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:13,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:13,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:13,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-26 00:52:13,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:13,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-26 00:52:13,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:13,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:13,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:13,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:13,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:13,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:13,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:13,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:13,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:13,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:13,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:13,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:13,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:13,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-26 00:52:14,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:14,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:14,875 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:14,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:14,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:14,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:14,937 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:14,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:14,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:14,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:15,018 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:15,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:15,045 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:52:15,059 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:52:22,168 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6106#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|)) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (not (<= (+ (* |ULTIMATE.start_finddup_~j~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|))) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~a#1.offset|) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (= (select (select |#memory_int| |ULTIMATE.start_finddup_~a#1.base|) (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) |ULTIMATE.start_finddup_#t~mem10#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (= (select |#valid| |ULTIMATE.start_finddup_~a#1.base|) 1) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= 1 |ULTIMATE.start_finddup_~n#1|) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (<= 0 (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-26 00:52:22,168 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:52:22,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:52:22,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-26 00:52:22,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294481497] [2022-11-26 00:52:22,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:52:22,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:52:22,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:52:22,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:52:22,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2022-11-26 00:52:22,171 INFO L87 Difference]: Start difference. First operand 125 states and 149 transitions. Second operand has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-26 00:52:23,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:52:23,388 INFO L93 Difference]: Finished difference Result 297 states and 341 transitions. [2022-11-26 00:52:23,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-26 00:52:23,389 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 31 [2022-11-26 00:52:23,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:52:23,391 INFO L225 Difference]: With dead ends: 297 [2022-11-26 00:52:23,391 INFO L226 Difference]: Without dead ends: 297 [2022-11-26 00:52:23,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=457, Invalid=2299, Unknown=0, NotChecked=0, Total=2756 [2022-11-26 00:52:23,393 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 1053 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:52:23,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1053 Valid, 717 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:52:23,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-26 00:52:23,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 125. [2022-11-26 00:52:23,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 81 states have (on average 1.4691358024691359) internal successors, (119), 107 states have internal predecessors, (119), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:52:23,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2022-11-26 00:52:23,401 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 31 [2022-11-26 00:52:23,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:52:23,401 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2022-11-26 00:52:23,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-26 00:52:23,402 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2022-11-26 00:52:23,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 00:52:23,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:52:23,403 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:52:23,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-26 00:52:23,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 00:52:23,608 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:52:23,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:52:23,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1795586004, now seen corresponding path program 1 times [2022-11-26 00:52:23,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:52:23,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388746994] [2022-11-26 00:52:23,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:52:23,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:52:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:52:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:52:23,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:52:23,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388746994] [2022-11-26 00:52:23,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388746994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:52:23,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:52:23,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:52:23,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192226177] [2022-11-26 00:52:23,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:52:23,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:52:23,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:52:23,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:52:23,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:52:23,736 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:52:23,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:52:23,787 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2022-11-26 00:52:23,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:52:23,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-11-26 00:52:23,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:52:23,790 INFO L225 Difference]: With dead ends: 124 [2022-11-26 00:52:23,790 INFO L226 Difference]: Without dead ends: 124 [2022-11-26 00:52:23,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:52:23,791 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 46 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:52:23,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 66 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:52:23,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-26 00:52:23,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-11-26 00:52:23,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 81 states have (on average 1.4567901234567902) internal successors, (118), 106 states have internal predecessors, (118), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:52:23,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2022-11-26 00:52:23,796 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 33 [2022-11-26 00:52:23,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:52:23,797 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2022-11-26 00:52:23,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:52:23,797 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2022-11-26 00:52:23,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 00:52:23,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:52:23,798 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:52:23,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-26 00:52:23,798 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:52:23,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:52:23,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1795586005, now seen corresponding path program 1 times [2022-11-26 00:52:23,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:52:23,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685422719] [2022-11-26 00:52:23,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:52:23,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:52:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:52:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:52:23,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:52:23,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685422719] [2022-11-26 00:52:23,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685422719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:52:23,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:52:23,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:52:23,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677686561] [2022-11-26 00:52:23,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:52:23,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:52:23,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:52:23,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:52:23,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:52:23,930 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:52:23,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:52:23,982 INFO L93 Difference]: Finished difference Result 123 states and 146 transitions. [2022-11-26 00:52:23,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:52:23,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-11-26 00:52:23,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:52:23,984 INFO L225 Difference]: With dead ends: 123 [2022-11-26 00:52:23,984 INFO L226 Difference]: Without dead ends: 123 [2022-11-26 00:52:23,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:52:23,985 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 47 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:52:23,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 64 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:52:23,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-26 00:52:23,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-11-26 00:52:23,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 81 states have (on average 1.4444444444444444) internal successors, (117), 105 states have internal predecessors, (117), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:52:23,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 146 transitions. [2022-11-26 00:52:23,990 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 146 transitions. Word has length 33 [2022-11-26 00:52:23,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:52:23,991 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 146 transitions. [2022-11-26 00:52:23,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:52:23,991 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 146 transitions. [2022-11-26 00:52:23,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-26 00:52:23,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:52:23,992 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:52:23,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-26 00:52:23,992 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:52:23,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:52:23,993 INFO L85 PathProgramCache]: Analyzing trace with hash -171408707, now seen corresponding path program 1 times [2022-11-26 00:52:23,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:52:23,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817873439] [2022-11-26 00:52:23,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:52:23,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:52:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:52:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:52:24,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:52:24,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817873439] [2022-11-26 00:52:24,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817873439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:52:24,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:52:24,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:52:24,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985291577] [2022-11-26 00:52:24,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:52:24,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:52:24,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:52:24,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:52:24,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:52:24,055 INFO L87 Difference]: Start difference. First operand 123 states and 146 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:52:24,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:52:24,104 INFO L93 Difference]: Finished difference Result 122 states and 145 transitions. [2022-11-26 00:52:24,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:52:24,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2022-11-26 00:52:24,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:52:24,106 INFO L225 Difference]: With dead ends: 122 [2022-11-26 00:52:24,106 INFO L226 Difference]: Without dead ends: 122 [2022-11-26 00:52:24,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:52:24,107 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 43 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:52:24,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 65 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:52:24,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-26 00:52:24,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-26 00:52:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 81 states have (on average 1.4320987654320987) internal successors, (116), 104 states have internal predecessors, (116), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:52:24,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2022-11-26 00:52:24,112 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 34 [2022-11-26 00:52:24,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:52:24,113 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2022-11-26 00:52:24,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:52:24,113 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2022-11-26 00:52:24,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-26 00:52:24,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:52:24,114 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:52:24,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-26 00:52:24,114 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:52:24,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:52:24,115 INFO L85 PathProgramCache]: Analyzing trace with hash -171408706, now seen corresponding path program 1 times [2022-11-26 00:52:24,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:52:24,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832248867] [2022-11-26 00:52:24,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:52:24,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:52:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:52:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:52:24,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:52:24,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832248867] [2022-11-26 00:52:24,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832248867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:52:24,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:52:24,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:52:24,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915477325] [2022-11-26 00:52:24,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:52:24,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:52:24,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:52:24,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:52:24,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:52:24,211 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:52:24,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:52:24,263 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2022-11-26 00:52:24,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:52:24,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2022-11-26 00:52:24,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:52:24,264 INFO L225 Difference]: With dead ends: 121 [2022-11-26 00:52:24,264 INFO L226 Difference]: Without dead ends: 121 [2022-11-26 00:52:24,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:52:24,265 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 44 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:52:24,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 63 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:52:24,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-26 00:52:24,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-26 00:52:24,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 81 states have (on average 1.4197530864197532) internal successors, (115), 103 states have internal predecessors, (115), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:52:24,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2022-11-26 00:52:24,270 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 34 [2022-11-26 00:52:24,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:52:24,270 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2022-11-26 00:52:24,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:52:24,271 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2022-11-26 00:52:24,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-26 00:52:24,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:52:24,273 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1] [2022-11-26 00:52:24,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-26 00:52:24,273 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:52:24,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:52:24,274 INFO L85 PathProgramCache]: Analyzing trace with hash 2081921806, now seen corresponding path program 1 times [2022-11-26 00:52:24,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:52:24,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251612598] [2022-11-26 00:52:24,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:52:24,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:52:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:52:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:52:24,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:52:24,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251612598] [2022-11-26 00:52:24,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251612598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:52:24,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:52:24,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-26 00:52:24,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535732196] [2022-11-26 00:52:24,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:52:24,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 00:52:24,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:52:24,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 00:52:24,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:52:24,529 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:52:24,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:52:24,889 INFO L93 Difference]: Finished difference Result 164 states and 189 transitions. [2022-11-26 00:52:24,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:52:24,890 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-11-26 00:52:24,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:52:24,891 INFO L225 Difference]: With dead ends: 164 [2022-11-26 00:52:24,891 INFO L226 Difference]: Without dead ends: 164 [2022-11-26 00:52:24,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:52:24,892 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 142 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:52:24,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 388 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:52:24,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-26 00:52:24,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 123. [2022-11-26 00:52:24,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 83 states have (on average 1.4216867469879517) internal successors, (118), 104 states have internal predecessors, (118), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:52:24,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 147 transitions. [2022-11-26 00:52:24,896 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 147 transitions. Word has length 36 [2022-11-26 00:52:24,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:52:24,897 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 147 transitions. [2022-11-26 00:52:24,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:52:24,897 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 147 transitions. [2022-11-26 00:52:24,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-26 00:52:24,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:52:24,897 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:52:24,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-26 00:52:24,898 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:52:24,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:52:24,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1015048301, now seen corresponding path program 2 times [2022-11-26 00:52:24,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:52:24,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259816747] [2022-11-26 00:52:24,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:52:24,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:52:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:52:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:52:25,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:52:25,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259816747] [2022-11-26 00:52:25,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259816747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:52:25,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318564224] [2022-11-26 00:52:25,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:52:25,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:52:25,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:52:25,005 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:52:25,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:52:25,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:52:25,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:52:25,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:52:25,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:52:25,236 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:52:25,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:52:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:52:25,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318564224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:52:25,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1238543615] [2022-11-26 00:52:25,529 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:52:25,529 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:52:25,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:52:25,530 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:52:25,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:52:25,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:25,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:25,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:25,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:52:25,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:25,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 00:52:25,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:25,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:25,661 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:25,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:25,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:25,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:25,727 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:25,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:25,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:25,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:25,830 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:25,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:25,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:25,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:25,921 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:25,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:26,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:26,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:26,047 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:26,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:26,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:26,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:26,136 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:26,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:26,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:26,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:26,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-26 00:52:26,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:26,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:26,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-26 00:52:26,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:26,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:26,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:26,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:26,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:26,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:26,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:26,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:26,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:26,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:26,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:26,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:26,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:26,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-26 00:52:28,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:28,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:28,059 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:28,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:28,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:28,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:28,121 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:28,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:28,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:28,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:28,188 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:28,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:28,213 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:52:28,226 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:52:36,015 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8097#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|)) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (not (<= (+ (* |ULTIMATE.start_finddup_~j~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|))) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~a#1.offset|) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (= (select (select |#memory_int| |ULTIMATE.start_finddup_~a#1.base|) (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) |ULTIMATE.start_finddup_#t~mem10#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (= (select |#valid| |ULTIMATE.start_finddup_~a#1.base|) 1) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= 1 |ULTIMATE.start_finddup_~n#1|) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (<= 0 (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-26 00:52:36,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:52:36,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:52:36,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-26 00:52:36,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015070924] [2022-11-26 00:52:36,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:52:36,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-26 00:52:36,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:52:36,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-26 00:52:36,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 00:52:36,017 INFO L87 Difference]: Start difference. First operand 123 states and 147 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:52:37,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:52:37,693 INFO L93 Difference]: Finished difference Result 450 states and 521 transitions. [2022-11-26 00:52:37,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-26 00:52:37,693 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-11-26 00:52:37,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:52:37,695 INFO L225 Difference]: With dead ends: 450 [2022-11-26 00:52:37,696 INFO L226 Difference]: Without dead ends: 450 [2022-11-26 00:52:37,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=643, Invalid=3647, Unknown=0, NotChecked=0, Total=4290 [2022-11-26 00:52:37,697 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 1329 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1333 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:52:37,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1333 Valid, 918 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:52:37,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-11-26 00:52:37,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 138. [2022-11-26 00:52:37,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 99 states have (on average 1.404040404040404) internal successors, (139), 119 states have internal predecessors, (139), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:52:37,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 168 transitions. [2022-11-26 00:52:37,706 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 168 transitions. Word has length 35 [2022-11-26 00:52:37,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:52:37,707 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 168 transitions. [2022-11-26 00:52:37,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:52:37,707 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 168 transitions. [2022-11-26 00:52:37,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:52:37,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:52:37,708 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:52:37,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:52:37,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:52:37,915 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:52:37,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:52:37,915 INFO L85 PathProgramCache]: Analyzing trace with hash -43186018, now seen corresponding path program 1 times [2022-11-26 00:52:37,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:52:37,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508466315] [2022-11-26 00:52:37,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:52:37,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:52:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:52:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:52:38,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:52:38,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508466315] [2022-11-26 00:52:38,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508466315] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:52:38,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906151889] [2022-11-26 00:52:38,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:52:38,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:52:38,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:52:38,396 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:52:38,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:52:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:52:38,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-26 00:52:38,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:52:38,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:52:38,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:52:38,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:52:38,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-26 00:52:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:52:38,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:52:39,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:52:39,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-26 00:52:39,073 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:52:39,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-11-26 00:52:39,076 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:52:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:52:39,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906151889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:52:39,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1631416652] [2022-11-26 00:52:39,244 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2022-11-26 00:52:39,245 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:52:39,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:52:39,245 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:52:39,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:52:39,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:39,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:39,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:39,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:52:39,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:39,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 00:52:39,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:39,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:39,367 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:39,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:39,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:39,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:39,439 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:39,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:39,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:39,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:39,547 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:39,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:39,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:39,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:39,623 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:39,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:39,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:39,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:39,764 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:39,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:39,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:39,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:39,877 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:39,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:39,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:39,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:39,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-26 00:52:40,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:40,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-26 00:52:40,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:40,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-26 00:52:40,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:40,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 62 [2022-11-26 00:52:40,327 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-26 00:52:40,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 57 [2022-11-26 00:52:40,510 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-26 00:52:40,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:40,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:40,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:40,781 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:40,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:52:40,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:40,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:40,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:41,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:41,043 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:41,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:52:41,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:41,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:41,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:41,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:41,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:41,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:41,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:41,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:41,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:41,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:41,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:41,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:41,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:41,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:41,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:41,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:41,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:41,696 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:41,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:52:42,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:42,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:42,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:42,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:42,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:42,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:42,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:42,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:42,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:42,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:42,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:42,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:42,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:42,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:42,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:42,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:42,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:52:42,272 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:42,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:52:42,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:42,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:42,371 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:42,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:42,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:42,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:42,431 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:42,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:42,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:42,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:42,499 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:52:42,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:52:42,522 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-11-26 00:52:42,532 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:52:42,546 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:53:03,296 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9012#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:53:03,296 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:53:03,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:53:03,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 30 [2022-11-26 00:53:03,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117006981] [2022-11-26 00:53:03,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:53:03,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-26 00:53:03,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:03,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-26 00:53:03,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2472, Unknown=7, NotChecked=0, Total=2862 [2022-11-26 00:53:03,299 INFO L87 Difference]: Start difference. First operand 138 states and 168 transitions. Second operand has 30 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 28 states have internal predecessors, (49), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:53:04,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:04,977 INFO L93 Difference]: Finished difference Result 184 states and 215 transitions. [2022-11-26 00:53:04,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-26 00:53:04,977 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 28 states have internal predecessors, (49), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2022-11-26 00:53:04,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:04,979 INFO L225 Difference]: With dead ends: 184 [2022-11-26 00:53:04,979 INFO L226 Difference]: Without dead ends: 184 [2022-11-26 00:53:04,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=867, Invalid=4676, Unknown=7, NotChecked=0, Total=5550 [2022-11-26 00:53:04,981 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 918 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:04,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 651 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:53:04,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-26 00:53:04,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 143. [2022-11-26 00:53:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 102 states have (on average 1.392156862745098) internal successors, (142), 123 states have internal predecessors, (142), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-26 00:53:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2022-11-26 00:53:04,988 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 37 [2022-11-26 00:53:04,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:04,989 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2022-11-26 00:53:04,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 28 states have internal predecessors, (49), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:53:04,989 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2022-11-26 00:53:04,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-26 00:53:04,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:04,990 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:53:05,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:53:05,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-26 00:53:05,197 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:53:05,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:05,197 INFO L85 PathProgramCache]: Analyzing trace with hash -986850864, now seen corresponding path program 3 times [2022-11-26 00:53:05,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:05,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935593000] [2022-11-26 00:53:05,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:05,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-26 00:53:13,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:13,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935593000] [2022-11-26 00:53:13,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935593000] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:53:13,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807211634] [2022-11-26 00:53:13,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:53:13,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:53:13,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:53:13,236 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:53:13,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:53:13,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:53:13,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:53:13,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-26 00:53:13,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:53:13,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:53:13,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-26 00:53:13,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-26 00:53:15,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 41 [2022-11-26 00:53:15,444 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:53:15,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:53:18,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807211634] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:53:18,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1406272420] [2022-11-26 00:53:18,478 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-26 00:53:18,478 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:53:18,478 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:53:18,479 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:53:18,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:53:18,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:18,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:18,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:18,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:53:18,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:18,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 00:53:18,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:18,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:18,597 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:18,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:53:18,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:18,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:18,659 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:18,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:53:18,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:18,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:18,797 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:18,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:53:18,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:18,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:18,870 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:18,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:53:18,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:18,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:19,016 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:19,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:53:19,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:19,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:19,104 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:19,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:53:19,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:19,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:19,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-26 00:53:19,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:19,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:19,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:19,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:19,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:19,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:19,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:19,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:19,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:19,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:19,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:19,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:19,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:19,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-26 00:53:19,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:19,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:19,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-26 00:53:21,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:21,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:21,022 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:21,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:53:21,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:21,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:21,091 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:21,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:53:21,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:21,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:21,154 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:21,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:53:21,188 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2022-11-26 00:53:21,191 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:53:21,204 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:53:30,220 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9649#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:53:30,220 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:53:30,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:53:30,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2022-11-26 00:53:30,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099905318] [2022-11-26 00:53:30,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:53:30,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-26 00:53:30,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:30,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-26 00:53:30,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=3100, Unknown=1, NotChecked=0, Total=3422 [2022-11-26 00:53:30,223 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-26 00:53:33,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:33,368 INFO L93 Difference]: Finished difference Result 125 states and 143 transitions. [2022-11-26 00:53:33,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:53:33,369 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 41 [2022-11-26 00:53:33,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:33,370 INFO L225 Difference]: With dead ends: 125 [2022-11-26 00:53:33,370 INFO L226 Difference]: Without dead ends: 125 [2022-11-26 00:53:33,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=409, Invalid=3750, Unknown=1, NotChecked=0, Total=4160 [2022-11-26 00:53:33,372 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 25 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:33,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 714 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-26 00:53:33,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-26 00:53:33,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 113. [2022-11-26 00:53:33,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 73 states have (on average 1.36986301369863) internal successors, (100), 94 states have internal predecessors, (100), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:53:33,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2022-11-26 00:53:33,377 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 41 [2022-11-26 00:53:33,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:33,378 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2022-11-26 00:53:33,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-26 00:53:33,378 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2022-11-26 00:53:33,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-26 00:53:33,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:33,379 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 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] [2022-11-26 00:53:33,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:53:33,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-26 00:53:33,594 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:53:33,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:33,595 INFO L85 PathProgramCache]: Analyzing trace with hash -2016286436, now seen corresponding path program 1 times [2022-11-26 00:53:33,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:33,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632885979] [2022-11-26 00:53:33,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:33,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:53:33,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:33,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632885979] [2022-11-26 00:53:33,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632885979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:53:33,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:53:33,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:53:33,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616372342] [2022-11-26 00:53:33,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:53:33,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:53:33,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:33,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:53:33,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:53:33,658 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:53:33,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:33,736 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2022-11-26 00:53:33,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:53:33,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-11-26 00:53:33,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:33,738 INFO L225 Difference]: With dead ends: 109 [2022-11-26 00:53:33,738 INFO L226 Difference]: Without dead ends: 109 [2022-11-26 00:53:33,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:53:33,739 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 78 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:33,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 81 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:53:33,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-26 00:53:33,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-11-26 00:53:33,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 73 states have (on average 1.3150684931506849) internal successors, (96), 90 states have internal predecessors, (96), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:53:33,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2022-11-26 00:53:33,743 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 41 [2022-11-26 00:53:33,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:33,744 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2022-11-26 00:53:33,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:53:33,744 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2022-11-26 00:53:33,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-26 00:53:33,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:33,745 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 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] [2022-11-26 00:53:33,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-26 00:53:33,745 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:53:33,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:33,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2016286435, now seen corresponding path program 1 times [2022-11-26 00:53:33,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:33,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210280647] [2022-11-26 00:53:33,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:33,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:53:33,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:33,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210280647] [2022-11-26 00:53:33,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210280647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:53:33,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:53:33,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:53:33,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14273140] [2022-11-26 00:53:33,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:53:33,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:53:33,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:33,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:53:33,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:53:33,878 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:53:33,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:33,980 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2022-11-26 00:53:33,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:53:33,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-11-26 00:53:33,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:33,981 INFO L225 Difference]: With dead ends: 105 [2022-11-26 00:53:33,981 INFO L226 Difference]: Without dead ends: 105 [2022-11-26 00:53:33,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:53:33,982 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 70 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:33,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 74 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:53:33,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-26 00:53:33,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-26 00:53:33,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 73 states have (on average 1.2602739726027397) internal successors, (92), 86 states have internal predecessors, (92), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:53:33,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2022-11-26 00:53:33,989 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 41 [2022-11-26 00:53:33,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:33,989 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2022-11-26 00:53:33,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:53:33,990 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2022-11-26 00:53:33,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-26 00:53:33,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:33,990 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:53:33,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-26 00:53:33,991 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:53:33,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:33,991 INFO L85 PathProgramCache]: Analyzing trace with hash 12704851, now seen corresponding path program 1 times [2022-11-26 00:53:33,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:33,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566907389] [2022-11-26 00:53:33,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:33,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:53:34,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:34,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566907389] [2022-11-26 00:53:34,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566907389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:53:34,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:53:34,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:53:34,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599589152] [2022-11-26 00:53:34,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:53:34,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:53:34,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:34,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:53:34,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:53:34,199 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:53:34,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:34,361 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2022-11-26 00:53:34,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:53:34,362 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 45 [2022-11-26 00:53:34,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:34,363 INFO L225 Difference]: With dead ends: 107 [2022-11-26 00:53:34,363 INFO L226 Difference]: Without dead ends: 107 [2022-11-26 00:53:34,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:53:34,364 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 77 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:34,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 228 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:53:34,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-26 00:53:34,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2022-11-26 00:53:34,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 86 states have internal predecessors, (91), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:53:34,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2022-11-26 00:53:34,367 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 45 [2022-11-26 00:53:34,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:34,368 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2022-11-26 00:53:34,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:53:34,368 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2022-11-26 00:53:34,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-26 00:53:34,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:34,368 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:53:34,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-26 00:53:34,369 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:53:34,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:34,369 INFO L85 PathProgramCache]: Analyzing trace with hash 231963315, now seen corresponding path program 1 times [2022-11-26 00:53:34,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:34,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641460674] [2022-11-26 00:53:34,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:34,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:53:34,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:34,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641460674] [2022-11-26 00:53:34,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641460674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:53:34,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:53:34,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:53:34,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805955615] [2022-11-26 00:53:34,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:53:34,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:53:34,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:34,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:53:34,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:53:34,610 INFO L87 Difference]: Start difference. First operand 105 states and 120 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:53:34,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:34,809 INFO L93 Difference]: Finished difference Result 111 states and 126 transitions. [2022-11-26 00:53:34,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:53:34,810 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2022-11-26 00:53:34,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:34,811 INFO L225 Difference]: With dead ends: 111 [2022-11-26 00:53:34,811 INFO L226 Difference]: Without dead ends: 111 [2022-11-26 00:53:34,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:53:34,812 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 104 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:34,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 211 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:53:34,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-26 00:53:34,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-11-26 00:53:34,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 76 states have (on average 1.236842105263158) internal successors, (94), 90 states have internal predecessors, (94), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-26 00:53:34,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2022-11-26 00:53:34,816 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 46 [2022-11-26 00:53:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:34,817 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2022-11-26 00:53:34,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:53:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2022-11-26 00:53:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-26 00:53:34,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:34,818 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 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, 1, 1, 1] [2022-11-26 00:53:34,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-26 00:53:34,818 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:53:34,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:34,819 INFO L85 PathProgramCache]: Analyzing trace with hash 778226521, now seen corresponding path program 1 times [2022-11-26 00:53:34,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:34,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461343980] [2022-11-26 00:53:34,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:34,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:53:35,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:35,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461343980] [2022-11-26 00:53:35,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461343980] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:53:35,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954634701] [2022-11-26 00:53:35,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:35,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:53:35,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:53:35,136 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:53:35,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:53:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:35,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-26 00:53:35,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:53:35,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:53:35,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:53:35,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:53:35,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:53:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:53:35,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:53:35,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954634701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:53:35,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:53:35,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 16 [2022-11-26 00:53:35,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875189784] [2022-11-26 00:53:35,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:53:35,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:53:35,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:35,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:53:35,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:53:35,637 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:53:37,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:53:39,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:53:41,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:53:43,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:53:45,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:53:45,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:45,374 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2022-11-26 00:53:45,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:53:45,375 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-11-26 00:53:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:45,375 INFO L225 Difference]: With dead ends: 129 [2022-11-26 00:53:45,375 INFO L226 Difference]: Without dead ends: 129 [2022-11-26 00:53:45,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:53:45,376 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 102 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 22 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:45,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 288 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 189 Invalid, 5 Unknown, 0 Unchecked, 9.7s Time] [2022-11-26 00:53:45,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-26 00:53:45,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2022-11-26 00:53:45,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 101 states have internal predecessors, (106), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:53:45,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2022-11-26 00:53:45,381 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 46 [2022-11-26 00:53:45,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:45,381 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2022-11-26 00:53:45,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:53:45,382 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2022-11-26 00:53:45,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-26 00:53:45,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:45,383 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1] [2022-11-26 00:53:45,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 00:53:45,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-26 00:53:45,589 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:53:45,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:45,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1326522291, now seen corresponding path program 1 times [2022-11-26 00:53:45,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:45,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896909820] [2022-11-26 00:53:45,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:45,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:45,653 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:53:45,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:45,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896909820] [2022-11-26 00:53:45,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896909820] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:53:45,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:53:45,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:53:45,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818599125] [2022-11-26 00:53:45,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:53:45,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:53:45,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:45,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:53:45,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:53:45,656 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2022-11-26 00:53:45,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:45,726 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2022-11-26 00:53:45,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:53:45,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 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 50 [2022-11-26 00:53:45,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:45,727 INFO L225 Difference]: With dead ends: 121 [2022-11-26 00:53:45,727 INFO L226 Difference]: Without dead ends: 121 [2022-11-26 00:53:45,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:53:45,729 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 56 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:45,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 76 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:53:45,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-26 00:53:45,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-26 00:53:45,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 88 states have (on average 1.1590909090909092) internal successors, (102), 97 states have internal predecessors, (102), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:53:45,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2022-11-26 00:53:45,733 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 50 [2022-11-26 00:53:45,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:45,734 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2022-11-26 00:53:45,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2022-11-26 00:53:45,734 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2022-11-26 00:53:45,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-26 00:53:45,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:45,735 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1] [2022-11-26 00:53:45,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-26 00:53:45,736 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:53:45,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:45,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1326522290, now seen corresponding path program 1 times [2022-11-26 00:53:45,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:45,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20187542] [2022-11-26 00:53:45,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:45,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:53:45,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:45,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20187542] [2022-11-26 00:53:45,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20187542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:53:45,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:53:45,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:53:45,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679411788] [2022-11-26 00:53:45,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:53:45,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:53:45,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:45,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:53:45,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:53:45,870 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2022-11-26 00:53:45,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:45,932 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2022-11-26 00:53:45,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:53:45,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 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 50 [2022-11-26 00:53:45,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:45,933 INFO L225 Difference]: With dead ends: 117 [2022-11-26 00:53:45,933 INFO L226 Difference]: Without dead ends: 117 [2022-11-26 00:53:45,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:53:45,934 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:45,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 69 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:53:45,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-26 00:53:45,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-11-26 00:53:45,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 88 states have (on average 1.1136363636363635) internal successors, (98), 93 states have internal predecessors, (98), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:53:45,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 127 transitions. [2022-11-26 00:53:45,938 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 127 transitions. Word has length 50 [2022-11-26 00:53:45,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:45,939 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 127 transitions. [2022-11-26 00:53:45,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2022-11-26 00:53:45,939 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 127 transitions. [2022-11-26 00:53:45,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-26 00:53:45,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:45,940 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1, 1, 1] [2022-11-26 00:53:45,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-26 00:53:45,941 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:53:45,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:45,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1761697376, now seen corresponding path program 1 times [2022-11-26 00:53:45,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:45,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959028354] [2022-11-26 00:53:45,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:45,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:53:46,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:46,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959028354] [2022-11-26 00:53:46,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959028354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:53:46,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418846074] [2022-11-26 00:53:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:46,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:53:46,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:53:46,450 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:53:46,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 00:53:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:46,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-26 00:53:46,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:53:46,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:53:46,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:53:46,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:53:47,332 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:53:47,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:53:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:53:47,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:53:47,607 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:53:47,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 706 treesize of output 654 [2022-11-26 00:53:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:53:48,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418846074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:53:48,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1977442205] [2022-11-26 00:53:48,538 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-11-26 00:53:48,538 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:53:48,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:53:48,539 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:53:48,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:53:48,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:48,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:48,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:48,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:53:48,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:48,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 00:53:48,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:48,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:48,678 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:48,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:53:48,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:48,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:48,737 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:48,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:53:48,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:48,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:48,843 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:48,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:53:48,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:48,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:48,916 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:48,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:53:49,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,067 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:49,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:53:49,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,155 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:49,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:53:49,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:49,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-26 00:53:49,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:49,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-26 00:53:49,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:49,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-26 00:53:49,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:49,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 62 [2022-11-26 00:53:49,722 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-26 00:53:49,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:49,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 72 [2022-11-26 00:53:49,918 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-26 00:53:50,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:50,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:50,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:50,210 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:50,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:53:50,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:50,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:50,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:50,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:50,445 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:50,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:53:51,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:51,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:51,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:51,219 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:51,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:53:51,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:51,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:51,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:51,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:51,801 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:51,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:53:53,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:53,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:53,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:53,449 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:53,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:53:53,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:53,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:53,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:53,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:53,770 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:53,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:53:55,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:55,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:55,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:55,135 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:55,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:53:55,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:55,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:55,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:55,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:55,444 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:55,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:53:56,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:56,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:56,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:56,094 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:56,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:53:56,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:56,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:56,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:56,327 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:56,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:53:56,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,427 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:56,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:53:56,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,486 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:56,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:53:56,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:56,549 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:53:56,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:53:56,573 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-26 00:53:56,581 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:53:56,594 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:54:30,811 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12065#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:54:30,811 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:54:30,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:54:30,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 32 [2022-11-26 00:54:30,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366134255] [2022-11-26 00:54:30,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:54:30,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-26 00:54:30,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:30,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-26 00:54:30,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=2961, Unknown=0, NotChecked=0, Total=3422 [2022-11-26 00:54:30,814 INFO L87 Difference]: Start difference. First operand 117 states and 127 transitions. Second operand has 32 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 31 states have internal predecessors, (71), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-26 00:54:32,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:32,887 INFO L93 Difference]: Finished difference Result 202 states and 212 transitions. [2022-11-26 00:54:32,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-26 00:54:32,888 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 31 states have internal predecessors, (71), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) Word has length 54 [2022-11-26 00:54:32,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:32,889 INFO L225 Difference]: With dead ends: 202 [2022-11-26 00:54:32,889 INFO L226 Difference]: Without dead ends: 200 [2022-11-26 00:54:32,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 103 SyntacticMatches, 15 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 36.3s TimeCoverageRelationStatistics Valid=859, Invalid=5303, Unknown=0, NotChecked=0, Total=6162 [2022-11-26 00:54:32,892 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 572 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:32,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 430 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:54:32,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-26 00:54:32,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 186. [2022-11-26 00:54:32,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 142 states have (on average 1.091549295774648) internal successors, (155), 148 states have internal predecessors, (155), 24 states have call successors, (24), 17 states have call predecessors, (24), 16 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-26 00:54:32,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 201 transitions. [2022-11-26 00:54:32,903 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 201 transitions. Word has length 54 [2022-11-26 00:54:32,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:32,904 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 201 transitions. [2022-11-26 00:54:32,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 31 states have internal predecessors, (71), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-26 00:54:32,904 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 201 transitions. [2022-11-26 00:54:32,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-26 00:54:32,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:32,906 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:32,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-26 00:54:33,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:33,118 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:54:33,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:33,119 INFO L85 PathProgramCache]: Analyzing trace with hash 160485480, now seen corresponding path program 1 times [2022-11-26 00:54:33,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:33,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761170558] [2022-11-26 00:54:33,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:33,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 00:54:33,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:33,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761170558] [2022-11-26 00:54:33,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761170558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:33,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837973074] [2022-11-26 00:54:33,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:33,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:33,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:33,352 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:33,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 00:54:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:33,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 00:54:33,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:33,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:54:33,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:54:33,830 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 00:54:33,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:54:33,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-11-26 00:54:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 00:54:34,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837973074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:54:34,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [92644463] [2022-11-26 00:54:34,085 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-26 00:54:34,085 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:54:34,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:54:34,086 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:54:34,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:54:34,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 00:54:34,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:54:34,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,214 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:54:34,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:54:34,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,278 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:54:34,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:54:34,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,396 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:54:34,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:54:34,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,482 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:54:34,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:54:34,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,625 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:54:34,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:54:34,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,716 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:54:34,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:54:34,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:54:34,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-26 00:54:34,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-26 00:54:34,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:54:34,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:34,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-26 00:54:36,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:36,768 INFO L321 Elim1Store]: treesize reduction 37, result has 38.3 percent of original size [2022-11-26 00:54:36,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 45 [2022-11-26 00:54:36,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:54:36,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:36,891 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-26 00:54:36,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 87 [2022-11-26 00:54:39,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:39,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:39,144 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:54:39,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:54:39,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:39,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:39,212 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:54:39,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:54:39,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:39,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:39,286 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:54:39,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:54:39,325 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-11-26 00:54:39,336 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:54:39,349 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:54:55,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12861#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:54:55,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:54:55,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:54:55,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2022-11-26 00:54:55,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870136658] [2022-11-26 00:54:55,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:54:55,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 00:54:55,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:55,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 00:54:55,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1951, Unknown=1, NotChecked=0, Total=2162 [2022-11-26 00:54:55,164 INFO L87 Difference]: Start difference. First operand 186 states and 201 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-26 00:54:56,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:54:58,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:55:00,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:55:02,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:55:04,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:55:06,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:55:06,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:55:06,868 INFO L93 Difference]: Finished difference Result 189 states and 199 transitions. [2022-11-26 00:55:06,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:55:06,869 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 55 [2022-11-26 00:55:06,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:55:06,870 INFO L225 Difference]: With dead ends: 189 [2022-11-26 00:55:06,870 INFO L226 Difference]: Without dead ends: 189 [2022-11-26 00:55:06,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=299, Invalid=2670, Unknown=1, NotChecked=0, Total=2970 [2022-11-26 00:55:06,871 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 184 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 38 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:55:06,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 443 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 319 Invalid, 6 Unknown, 0 Unchecked, 11.5s Time] [2022-11-26 00:55:06,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-26 00:55:06,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2022-11-26 00:55:06,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 142 states have (on average 1.0845070422535212) internal successors, (154), 147 states have internal predecessors, (154), 23 states have call successors, (23), 17 states have call predecessors, (23), 16 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-26 00:55:06,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 198 transitions. [2022-11-26 00:55:06,877 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 198 transitions. Word has length 55 [2022-11-26 00:55:06,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:55:06,877 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 198 transitions. [2022-11-26 00:55:06,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-26 00:55:06,877 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 198 transitions. [2022-11-26 00:55:06,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-26 00:55:06,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:55:06,878 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2022-11-26 00:55:06,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-26 00:55:07,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-26 00:55:07,079 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:55:07,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:55:07,079 INFO L85 PathProgramCache]: Analyzing trace with hash -721790580, now seen corresponding path program 1 times [2022-11-26 00:55:07,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:55:07,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373896401] [2022-11-26 00:55:07,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:07,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:55:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:55:07,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:55:07,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373896401] [2022-11-26 00:55:07,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373896401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:55:07,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237486920] [2022-11-26 00:55:07,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:07,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:07,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:55:07,834 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:55:07,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-26 00:55:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:07,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-26 00:55:07,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:55:08,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:55:08,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:55:08,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:55:09,427 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:55:09,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 26 [2022-11-26 00:55:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 00:55:09,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:55:09,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237486920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:55:09,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:55:09,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14] total 26 [2022-11-26 00:55:09,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65438523] [2022-11-26 00:55:09,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:55:09,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:55:09,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:55:09,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:55:09,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:55:09,471 INFO L87 Difference]: Start difference. First operand 185 states and 198 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-26 00:55:11,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:55:12,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:55:12,288 INFO L93 Difference]: Finished difference Result 184 states and 195 transitions. [2022-11-26 00:55:12,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:55:12,288 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 58 [2022-11-26 00:55:12,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:55:12,289 INFO L225 Difference]: With dead ends: 184 [2022-11-26 00:55:12,289 INFO L226 Difference]: Without dead ends: 184 [2022-11-26 00:55:12,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:55:12,290 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 144 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:55:12,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 121 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 128 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-11-26 00:55:12,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-26 00:55:12,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-11-26 00:55:12,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 142 states have (on average 1.0633802816901408) internal successors, (151), 146 states have internal predecessors, (151), 23 states have call successors, (23), 17 states have call predecessors, (23), 16 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-26 00:55:12,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 195 transitions. [2022-11-26 00:55:12,296 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 195 transitions. Word has length 58 [2022-11-26 00:55:12,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:55:12,296 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 195 transitions. [2022-11-26 00:55:12,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-26 00:55:12,296 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 195 transitions. [2022-11-26 00:55:12,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-26 00:55:12,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:55:12,297 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:55:12,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-26 00:55:12,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-26 00:55:12,498 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:55:12,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:55:12,498 INFO L85 PathProgramCache]: Analyzing trace with hash 2143956239, now seen corresponding path program 1 times [2022-11-26 00:55:12,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:55:12,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158909080] [2022-11-26 00:55:12,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:12,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:55:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 00:55:12,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:55:12,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158909080] [2022-11-26 00:55:12,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158909080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:55:12,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:55:12,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:55:12,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646423732] [2022-11-26 00:55:12,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:55:12,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:55:12,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:55:12,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:55:12,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:55:12,942 INFO L87 Difference]: Start difference. First operand 184 states and 195 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-26 00:55:13,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:55:13,450 INFO L93 Difference]: Finished difference Result 184 states and 193 transitions. [2022-11-26 00:55:13,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:55:13,451 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 60 [2022-11-26 00:55:13,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:55:13,452 INFO L225 Difference]: With dead ends: 184 [2022-11-26 00:55:13,452 INFO L226 Difference]: Without dead ends: 184 [2022-11-26 00:55:13,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:55:13,453 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 120 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:55:13,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 174 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:55:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-26 00:55:13,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-11-26 00:55:13,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 142 states have (on average 1.0492957746478873) internal successors, (149), 146 states have internal predecessors, (149), 23 states have call successors, (23), 17 states have call predecessors, (23), 16 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-26 00:55:13,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 193 transitions. [2022-11-26 00:55:13,459 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 193 transitions. Word has length 60 [2022-11-26 00:55:13,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:55:13,460 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 193 transitions. [2022-11-26 00:55:13,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-26 00:55:13,460 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 193 transitions. [2022-11-26 00:55:13,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-26 00:55:13,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:55:13,461 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:55:13,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-26 00:55:13,461 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:55:13,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:55:13,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1395584350, now seen corresponding path program 1 times [2022-11-26 00:55:13,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:55:13,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581977541] [2022-11-26 00:55:13,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:13,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:55:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:55:14,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:55:14,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581977541] [2022-11-26 00:55:14,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581977541] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:55:14,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505143854] [2022-11-26 00:55:14,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:14,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:14,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:55:14,113 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:55:14,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-26 00:55:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:14,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-26 00:55:14,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:55:14,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:55:14,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:55:14,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-26 00:55:15,323 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:55:15,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2022-11-26 00:55:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:55:15,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:55:15,618 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:55:15,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 706 treesize of output 654 [2022-11-26 00:55:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:55:16,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505143854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:55:16,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [812537733] [2022-11-26 00:55:16,753 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-11-26 00:55:16,753 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:55:16,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:55:16,753 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:55:16,754 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:55:16,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:16,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 00:55:16,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:16,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:16,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:16,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:55:16,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:16,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:16,872 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:55:16,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:55:16,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:16,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:16,928 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:55:16,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:55:17,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:17,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:17,051 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:55:17,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:55:17,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:17,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:17,133 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:55:17,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:55:17,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:17,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:17,267 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:55:17,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:55:17,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:17,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:17,340 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:55:17,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:55:17,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:55:17,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:17,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-26 00:55:17,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:17,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-26 00:55:17,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:55:17,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:17,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:17,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:17,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:17,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:17,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:17,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:17,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:17,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:17,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:17,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:17,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:17,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-26 00:55:18,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:18,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:18,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:55:18,235 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-26 00:55:18,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 37 [2022-11-26 00:55:18,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:18,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:55:18,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:18,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:55:18,350 INFO L321 Elim1Store]: treesize reduction 28, result has 55.6 percent of original size [2022-11-26 00:55:18,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 63 [2022-11-26 00:55:20,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:20,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:20,457 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:55:20,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:55:20,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:20,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:20,523 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:55:20,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:55:20,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:20,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:20,582 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:55:20,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:55:20,606 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-26 00:55:20,614 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:55:20,627 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:55:43,099 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14653#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:55:43,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:55:43,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:55:43,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 15] total 38 [2022-11-26 00:55:43,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754134182] [2022-11-26 00:55:43,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:55:43,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-26 00:55:43,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:55:43,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-26 00:55:43,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=4909, Unknown=0, NotChecked=0, Total=5256 [2022-11-26 00:55:43,102 INFO L87 Difference]: Start difference. First operand 184 states and 193 transitions. Second operand has 38 states, 33 states have (on average 2.878787878787879) internal successors, (95), 37 states have internal predecessors, (95), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-26 00:55:46,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:55:46,861 INFO L93 Difference]: Finished difference Result 243 states and 252 transitions. [2022-11-26 00:55:46,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-26 00:55:46,862 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 2.878787878787879) internal successors, (95), 37 states have internal predecessors, (95), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) Word has length 62 [2022-11-26 00:55:46,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:55:46,863 INFO L225 Difference]: With dead ends: 243 [2022-11-26 00:55:46,863 INFO L226 Difference]: Without dead ends: 239 [2022-11-26 00:55:46,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 123 SyntacticMatches, 7 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3622 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=928, Invalid=9172, Unknown=0, NotChecked=0, Total=10100 [2022-11-26 00:55:46,865 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 591 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:55:46,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 694 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-26 00:55:46,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-26 00:55:46,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 121. [2022-11-26 00:55:46,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 93 states have (on average 1.053763440860215) internal successors, (98), 95 states have internal predecessors, (98), 14 states have call successors, (14), 12 states have call predecessors, (14), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-26 00:55:46,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2022-11-26 00:55:46,872 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 62 [2022-11-26 00:55:46,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:55:46,872 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2022-11-26 00:55:46,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 2.878787878787879) internal successors, (95), 37 states have internal predecessors, (95), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-26 00:55:46,873 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2022-11-26 00:55:46,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-26 00:55:46,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:55:46,874 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:55:46,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-26 00:55:47,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:47,081 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:55:47,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:55:47,081 INFO L85 PathProgramCache]: Analyzing trace with hash 99582740, now seen corresponding path program 1 times [2022-11-26 00:55:47,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:55:47,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045464586] [2022-11-26 00:55:47,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:47,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:55:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:55:48,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:55:48,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045464586] [2022-11-26 00:55:48,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045464586] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:55:48,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862284489] [2022-11-26 00:55:48,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:48,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:48,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:55:48,442 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:55:48,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-26 00:55:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:48,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-26 00:55:48,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:55:48,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-26 00:55:49,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-26 00:55:49,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-26 00:55:49,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:55:50,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:50,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2022-11-26 00:55:50,308 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-26 00:55:50,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:50,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:50,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 51 [2022-11-26 00:55:50,470 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-26 00:55:54,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:54,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:54,315 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:55:54,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 47 [2022-11-26 00:55:54,324 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 22 [2022-11-26 00:55:54,331 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 22 [2022-11-26 00:55:54,519 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-26 00:55:54,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:55:55,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:55:55,795 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 4 [2022-11-26 00:56:00,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862284489] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:56:00,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [991361354] [2022-11-26 00:56:00,605 INFO L159 IcfgInterpreter]: Started Sifa with 45 locations of interest [2022-11-26 00:56:00,605 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:56:00,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:56:00,606 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:56:00,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:56:00,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:00,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:00,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:00,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:56:00,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:00,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 00:56:00,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:00,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:00,739 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:56:00,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:56:00,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:00,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:00,800 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:56:00,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:56:00,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:00,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:00,919 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:56:00,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:56:00,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:00,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:00,995 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:56:00,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:56:01,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,119 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:56:01,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:56:01,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,193 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:56:01,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:56:01,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:01,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-26 00:56:01,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:01,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-26 00:56:01,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:01,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-26 00:56:01,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:01,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 62 [2022-11-26 00:56:01,712 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-26 00:56:01,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 57 [2022-11-26 00:56:01,850 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-26 00:56:01,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:01,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:02,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:02,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:02,053 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:56:02,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:56:02,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:02,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:02,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:02,274 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:56:02,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:56:02,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:02,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:02,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:02,759 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:56:02,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:56:02,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:02,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:02,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:03,028 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:56:03,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:56:04,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:04,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:04,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:04,174 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:56:04,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:56:04,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:04,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:04,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:04,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:04,730 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:56:04,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:56:05,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:05,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:05,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:05,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:05,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:05,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:05,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:05,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:05,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:05,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:05,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:05,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:05,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:05,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:05,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:05,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:05,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:05,936 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:56:05,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:56:06,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:06,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:06,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:06,183 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:56:06,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:56:06,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:06,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:06,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:06,818 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:56:06,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:56:06,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:06,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:06,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:06,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:07,030 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:56:07,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:56:07,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:07,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:07,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:07,247 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:56:07,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:56:07,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:07,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:07,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:07,697 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:56:07,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:56:07,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:07,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:08,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:08,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:08,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:08,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:08,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:08,042 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:56:08,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:56:08,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:08,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:08,134 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:56:08,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:56:08,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:08,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:08,196 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:56:08,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:56:08,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:08,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:08,259 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:56:08,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:56:08,284 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 163 for LOIs [2022-11-26 00:56:08,522 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:56:08,535 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:57:05,575 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15507#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:57:05,575 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:57:05,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:57:05,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 42 [2022-11-26 00:57:05,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079361232] [2022-11-26 00:57:05,576 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:57:05,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-26 00:57:05,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:57:05,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-26 00:57:05,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=6518, Unknown=2, NotChecked=0, Total=7482 [2022-11-26 00:57:05,578 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand has 42 states, 37 states have (on average 2.027027027027027) internal successors, (75), 40 states have internal predecessors, (75), 8 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-26 00:57:15,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:57:15,220 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2022-11-26 00:57:15,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-26 00:57:15,221 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 2.027027027027027) internal successors, (75), 40 states have internal predecessors, (75), 8 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 64 [2022-11-26 00:57:15,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:57:15,224 INFO L225 Difference]: With dead ends: 162 [2022-11-26 00:57:15,224 INFO L226 Difference]: Without dead ends: 80 [2022-11-26 00:57:15,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 89 SyntacticMatches, 26 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5455 ImplicationChecksByTransitivity, 73.8s TimeCoverageRelationStatistics Valid=1767, Invalid=11113, Unknown=2, NotChecked=0, Total=12882 [2022-11-26 00:57:15,225 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 330 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:57:15,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 347 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-26 00:57:15,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-26 00:57:15,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-26 00:57:15,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 63 states have internal predecessors, (64), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-26 00:57:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2022-11-26 00:57:15,229 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 64 [2022-11-26 00:57:15,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:57:15,232 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2022-11-26 00:57:15,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 2.027027027027027) internal successors, (75), 40 states have internal predecessors, (75), 8 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-26 00:57:15,232 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2022-11-26 00:57:15,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-26 00:57:15,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:57:15,235 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:57:15,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-26 00:57:15,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:57:15,441 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:57:15,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:57:15,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1985221542, now seen corresponding path program 1 times [2022-11-26 00:57:15,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:57:15,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621806432] [2022-11-26 00:57:15,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:15,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:57:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 00:57:16,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:57:16,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621806432] [2022-11-26 00:57:16,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621806432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:57:16,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762745647] [2022-11-26 00:57:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:16,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:57:16,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:57:16,119 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:57:16,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-26 00:57:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:16,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-26 00:57:16,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:57:16,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:57:17,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:57:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 00:57:17,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:57:17,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-11-26 00:57:17,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:17,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:17,812 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:57:17,813 INFO L350 Elim1Store]: Elim1 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 41 [2022-11-26 00:57:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 00:57:18,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762745647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:57:18,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [996113665] [2022-11-26 00:57:18,111 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2022-11-26 00:57:18,111 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:57:18,111 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:57:18,111 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:57:18,112 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:57:18,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 00:57:18,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:57:18,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,234 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:57:18,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:57:18,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,290 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:57:18,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:57:18,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,385 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:57:18,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:57:18,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,458 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:57:18,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:57:18,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,621 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:57:18,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:57:18,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,693 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:57:18,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:57:18,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:57:18,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-26 00:57:18,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:57:18,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-26 00:57:18,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:18,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-26 00:57:20,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:20,549 INFO L321 Elim1Store]: treesize reduction 37, result has 38.3 percent of original size [2022-11-26 00:57:20,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 45 [2022-11-26 00:57:20,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:57:20,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:20,683 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-26 00:57:20,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 87 [2022-11-26 00:57:24,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:24,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:24,641 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:57:24,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:57:24,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:24,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:24,700 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:57:24,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:57:24,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:24,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:24,760 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:57:24,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 00:57:24,783 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-26 00:57:24,789 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:57:24,803 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:57:51,976 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16280#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= (+ |ULTIMATE.start_main_~#i~2#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#i~2#1.base|)) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= (select |#valid| |ULTIMATE.start_main_~#j~2#1.base|) 1) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (not (<= (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_#t~mem24#1| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|))) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_#t~mem23#1| 4))) |ULTIMATE.start_main_#t~mem25#1|) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (= |ULTIMATE.start_finddup_#res#1| 1) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#j~2#1.base|) |ULTIMATE.start_main_~#j~2#1.offset|)) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#i~2#1.base|) |ULTIMATE.start_main_~#i~2#1.offset|)) (= (select |#valid| |ULTIMATE.start_main_~#i~2#1.base|) 1) (<= 0 |ULTIMATE.start_finddup_~a#1.offset|) (<= |ULTIMATE.start_main_~r~0#1| 1) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (<= 1 |ULTIMATE.start_finddup_~j~1#1|) (<= 0 |ULTIMATE.start_finddup_~i~1#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= (+ |ULTIMATE.start_main_~#j~2#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#j~2#1.base|)) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= 0 (select (select |#memory_int| |ULTIMATE.start_main_~#i~2#1.base|) |ULTIMATE.start_main_~#i~2#1.offset|)) (<= 1 |ULTIMATE.start_main_~r~0#1|) (< (select (select |#memory_int| |ULTIMATE.start_main_~#j~2#1.base|) |ULTIMATE.start_main_~#j~2#1.offset|) |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= (+ |ULTIMATE.start_main_~a~0#1.offset| 4 (* |ULTIMATE.start_main_#t~mem23#1| 4)) (select |#length| |ULTIMATE.start_main_~a~0#1.base|)) (<= 1 |ULTIMATE.start_finddup_~n#1|) (= (select |#valid| |ULTIMATE.start_main_~a~0#1.base|) 1) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-26 00:57:51,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:57:51,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:57:51,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2022-11-26 00:57:51,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824536039] [2022-11-26 00:57:51,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:57:51,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-26 00:57:51,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:57:51,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-26 00:57:51,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=4503, Unknown=0, NotChecked=0, Total=4970 [2022-11-26 00:57:51,979 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 31 states, 30 states have (on average 3.966666666666667) internal successors, (119), 31 states have internal predecessors, (119), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-11-26 00:57:53,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:57:53,428 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2022-11-26 00:57:53,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:57:53,428 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.966666666666667) internal successors, (119), 31 states have internal predecessors, (119), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 70 [2022-11-26 00:57:53,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:57:53,429 INFO L225 Difference]: With dead ends: 81 [2022-11-26 00:57:53,429 INFO L226 Difference]: Without dead ends: 81 [2022-11-26 00:57:53,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 139 SyntacticMatches, 11 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2247 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=652, Invalid=5990, Unknown=0, NotChecked=0, Total=6642 [2022-11-26 00:57:53,431 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 254 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:57:53,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 264 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:57:53,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-26 00:57:53,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-11-26 00:57:53,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-26 00:57:53,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2022-11-26 00:57:53,435 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 70 [2022-11-26 00:57:53,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:57:53,435 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2022-11-26 00:57:53,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.966666666666667) internal successors, (119), 31 states have internal predecessors, (119), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-11-26 00:57:53,436 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2022-11-26 00:57:53,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-26 00:57:53,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:57:53,437 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:57:53,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-26 00:57:53,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-26 00:57:53,648 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 00:57:53,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:57:53,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1090870049, now seen corresponding path program 1 times [2022-11-26 00:57:53,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:57:53,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637338553] [2022-11-26 00:57:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:53,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:57:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:08,250 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:58:08,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:08,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637338553] [2022-11-26 00:58:08,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637338553] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:08,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776113361] [2022-11-26 00:58:08,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:08,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:08,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:08,252 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:08,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-26 00:58:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:08,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-26 00:58:08,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:08,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:58:08,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:58:10,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:10,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:10,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:58:10,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:10,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:10,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 39 [2022-11-26 00:58:13,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:13,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:13,157 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-26 00:58:13,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 36 [2022-11-26 00:58:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 00:58:13,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:16,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:16,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:16,087 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:58:16,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 6236 treesize of output 5752 [2022-11-26 00:58:16,133 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:58:16,133 INFO L350 Elim1Store]: Elim1 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 9264 treesize of output 7880 [2022-11-26 00:58:16,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:58:17,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 5334 treesize of output 4822 [2022-11-26 00:58:24,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 4881 treesize of output 4353 [2022-11-26 01:01:09,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:01:09,764 INFO L350 Elim1Store]: Elim1 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 307 treesize of output 251 [2022-11-26 01:01:10,267 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 01:01:10,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776113361] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:01:10,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2135157960] [2022-11-26 01:01:10,270 INFO L159 IcfgInterpreter]: Started Sifa with 45 locations of interest [2022-11-26 01:01:10,274 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:01:10,274 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:01:10,276 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:01:10,277 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:01:10,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:10,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 01:01:10,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:10,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:10,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:10,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 01:01:10,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:10,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:10,421 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:01:10,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 01:01:10,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:10,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:10,501 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:01:10,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 01:01:10,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:10,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:10,627 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:01:10,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 01:01:10,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:10,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:10,714 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:01:10,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 01:01:10,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:10,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:10,859 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:01:10,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 01:01:10,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:10,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:10,949 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:01:10,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 01:01:11,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:11,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:11,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-26 01:01:11,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:11,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-26 01:01:11,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:11,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:11,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:11,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:11,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:11,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:11,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:11,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:11,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:11,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:11,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:11,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:11,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:11,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-26 01:01:12,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:12,943 INFO L321 Elim1Store]: treesize reduction 37, result has 38.3 percent of original size [2022-11-26 01:01:12,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 45 [2022-11-26 01:01:13,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:13,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:13,088 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-26 01:01:13,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 87 [2022-11-26 01:01:17,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:17,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:17,503 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:01:17,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 01:01:17,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:17,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:17,570 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:01:17,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 01:01:17,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:17,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:17,633 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:01:17,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-26 01:01:17,658 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-26 01:01:17,666 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 01:01:17,681 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:01:55,668 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17000#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:01:55,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:01:55,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:01:55,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 21] total 60 [2022-11-26 01:01:55,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409315297] [2022-11-26 01:01:55,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:01:55,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-26 01:01:55,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:55,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-26 01:01:55,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=588, Invalid=9512, Unknown=0, NotChecked=0, Total=10100 [2022-11-26 01:01:55,672 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 60 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 59 states have internal predecessors, (122), 11 states have call successors, (24), 4 states have call predecessors, (24), 5 states have return successors, (22), 7 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-26 01:02:25,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:25,187 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2022-11-26 01:02:25,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-26 01:02:25,188 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 59 states have internal predecessors, (122), 11 states have call successors, (24), 4 states have call predecessors, (24), 5 states have return successors, (22), 7 states have call predecessors, (22), 10 states have call successors, (22) Word has length 74 [2022-11-26 01:02:25,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:25,188 INFO L225 Difference]: With dead ends: 80 [2022-11-26 01:02:25,189 INFO L226 Difference]: Without dead ends: 80 [2022-11-26 01:02:25,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 147 SyntacticMatches, 8 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4648 ImplicationChecksByTransitivity, 73.9s TimeCoverageRelationStatistics Valid=1130, Invalid=14872, Unknown=0, NotChecked=0, Total=16002 [2022-11-26 01:02:25,191 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 375 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:25,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 300 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-26 01:02:25,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-26 01:02:25,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2022-11-26 01:02:25,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-26 01:02:25,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-11-26 01:02:25,204 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2022-11-26 01:02:25,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:25,204 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-11-26 01:02:25,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 59 states have internal predecessors, (122), 11 states have call successors, (24), 4 states have call predecessors, (24), 5 states have return successors, (22), 7 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-26 01:02:25,205 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-11-26 01:02:25,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-26 01:02:25,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:25,206 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:25,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:25,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-26 01:02:25,413 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-26 01:02:25,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:25,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1985382166, now seen corresponding path program 1 times [2022-11-26 01:02:25,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:25,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439853292] [2022-11-26 01:02:25,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:25,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-26 01:02:27,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:27,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439853292] [2022-11-26 01:02:27,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439853292] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:27,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148007101] [2022-11-26 01:02:27,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:27,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:27,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:27,422 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:27,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-26 01:02:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:27,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-26 01:02:27,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:27,723 INFO L321 Elim1Store]: treesize reduction 88, result has 24.8 percent of original size [2022-11-26 01:02:27,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 70 [2022-11-26 01:02:30,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 55 [2022-11-26 01:02:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-26 01:02:30,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:30,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148007101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:30,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:30,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [16] total 20 [2022-11-26 01:02:30,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441242983] [2022-11-26 01:02:30,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:30,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:02:30,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:30,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:02:30,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-11-26 01:02:30,578 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 01:02:31,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:02:31,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:31,915 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2022-11-26 01:02:31,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:02:31,916 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 80 [2022-11-26 01:02:31,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:31,916 INFO L225 Difference]: With dead ends: 76 [2022-11-26 01:02:31,916 INFO L226 Difference]: Without dead ends: 0 [2022-11-26 01:02:31,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-11-26 01:02:31,917 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:31,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 91 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 208 Invalid, 1 Unknown, 0 Unchecked, 1.3s Time] [2022-11-26 01:02:31,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-26 01:02:31,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-26 01:02:31,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:31,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-26 01:02:31,918 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2022-11-26 01:02:31,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:31,918 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-26 01:02:31,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 01:02:31,919 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-26 01:02:31,919 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-26 01:02:31,921 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 37 remaining) [2022-11-26 01:02:31,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 37 remaining) [2022-11-26 01:02:31,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 37 remaining) [2022-11-26 01:02:31,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 37 remaining) [2022-11-26 01:02:31,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 37 remaining) [2022-11-26 01:02:31,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 37 remaining) [2022-11-26 01:02:31,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 37 remaining) [2022-11-26 01:02:31,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 37 remaining) [2022-11-26 01:02:31,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 37 remaining) [2022-11-26 01:02:31,924 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 37 remaining) [2022-11-26 01:02:31,924 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 37 remaining) [2022-11-26 01:02:31,924 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 37 remaining) [2022-11-26 01:02:31,924 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 37 remaining) [2022-11-26 01:02:31,924 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 37 remaining) [2022-11-26 01:02:31,925 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 37 remaining) [2022-11-26 01:02:31,925 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 37 remaining) [2022-11-26 01:02:31,925 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 37 remaining) [2022-11-26 01:02:31,925 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 37 remaining) [2022-11-26 01:02:31,926 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 37 remaining) [2022-11-26 01:02:31,926 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 37 remaining) [2022-11-26 01:02:31,926 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 37 remaining) [2022-11-26 01:02:31,926 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 37 remaining) [2022-11-26 01:02:31,926 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 37 remaining) [2022-11-26 01:02:31,927 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 37 remaining) [2022-11-26 01:02:31,927 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 37 remaining) [2022-11-26 01:02:31,927 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 37 remaining) [2022-11-26 01:02:31,927 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 37 remaining) [2022-11-26 01:02:31,927 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 37 remaining) [2022-11-26 01:02:31,928 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 37 remaining) [2022-11-26 01:02:31,928 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 37 remaining) [2022-11-26 01:02:31,928 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 37 remaining) [2022-11-26 01:02:31,928 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 37 remaining) [2022-11-26 01:02:31,929 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE (4 of 37 remaining) [2022-11-26 01:02:31,929 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE (3 of 37 remaining) [2022-11-26 01:02:31,929 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE (2 of 37 remaining) [2022-11-26 01:02:31,929 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_LEAK (1 of 37 remaining) [2022-11-26 01:02:31,929 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 37 remaining) [2022-11-26 01:02:31,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:32,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-26 01:02:32,139 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:32,142 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 01:02:32,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 01:02:32 BoogieIcfgContainer [2022-11-26 01:02:32,146 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 01:02:32,147 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 01:02:32,147 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 01:02:32,147 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 01:02:32,148 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:50:30" (3/4) ... [2022-11-26 01:02:32,151 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-26 01:02:32,159 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2022-11-26 01:02:32,159 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-26 01:02:32,168 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 30 nodes and edges [2022-11-26 01:02:32,168 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-11-26 01:02:32,169 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-26 01:02:32,169 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-26 01:02:32,226 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-26 01:02:32,227 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 01:02:32,227 INFO L158 Benchmark]: Toolchain (without parser) took 722556.59ms. Allocated memory was 148.9MB in the beginning and 648.0MB in the end (delta: 499.1MB). Free memory was 105.1MB in the beginning and 213.7MB in the end (delta: -108.6MB). Peak memory consumption was 393.3MB. Max. memory is 16.1GB. [2022-11-26 01:02:32,227 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 148.9MB. Free memory was 118.3MB in the beginning and 118.1MB in the end (delta: 140.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 01:02:32,227 INFO L158 Benchmark]: CACSL2BoogieTranslator took 247.74ms. Allocated memory is still 148.9MB. Free memory was 104.7MB in the beginning and 93.7MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-26 01:02:32,228 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.45ms. Allocated memory is still 148.9MB. Free memory was 93.7MB in the beginning and 91.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 01:02:32,228 INFO L158 Benchmark]: Boogie Preprocessor took 73.28ms. Allocated memory is still 148.9MB. Free memory was 91.6MB in the beginning and 90.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 01:02:32,228 INFO L158 Benchmark]: RCFGBuilder took 814.52ms. Allocated memory is still 148.9MB. Free memory was 90.0MB in the beginning and 65.9MB in the end (delta: 24.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-11-26 01:02:32,228 INFO L158 Benchmark]: TraceAbstraction took 721276.18ms. Allocated memory was 148.9MB in the beginning and 648.0MB in the end (delta: 499.1MB). Free memory was 65.3MB in the beginning and 217.9MB in the end (delta: -152.6MB). Peak memory consumption was 349.2MB. Max. memory is 16.1GB. [2022-11-26 01:02:32,228 INFO L158 Benchmark]: Witness Printer took 79.79ms. Allocated memory is still 648.0MB. Free memory was 217.9MB in the beginning and 213.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-26 01:02:32,229 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 148.9MB. Free memory was 118.3MB in the beginning and 118.1MB in the end (delta: 140.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 247.74ms. Allocated memory is still 148.9MB. Free memory was 104.7MB in the beginning and 93.7MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.45ms. Allocated memory is still 148.9MB. Free memory was 93.7MB in the beginning and 91.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 73.28ms. Allocated memory is still 148.9MB. Free memory was 91.6MB in the beginning and 90.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 814.52ms. Allocated memory is still 148.9MB. Free memory was 90.0MB in the beginning and 65.9MB in the end (delta: 24.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 721276.18ms. Allocated memory was 148.9MB in the beginning and 648.0MB in the end (delta: 499.1MB). Free memory was 65.3MB in the beginning and 217.9MB in the end (delta: -152.6MB). Peak memory consumption was 349.2MB. Max. memory is 16.1GB. * Witness Printer took 79.79ms. Allocated memory is still 648.0MB. Free memory was 217.9MB in the beginning and 213.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 64]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 64]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 64]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 10]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 87 locations, 37 error locations. Started 1 CEGAR loops. OverallTime: 721.2s, OverallIterations: 40, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 96.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 mSolverCounterUnknown, 11749 SdHoareTripleChecker+Valid, 49.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11654 mSDsluCounter, 12811 SdHoareTripleChecker+Invalid, 47.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10323 mSDsCounter, 2163 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18044 IncrementalHoareTripleChecker+Invalid, 20220 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2163 mSolverCounterUnsat, 2488 mSDtfsCounter, 18044 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2930 GetRequests, 1554 SyntacticMatches, 128 SemanticMatches, 1248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28694 ImplicationChecksByTransitivity, 373.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=186occurred in iteration=32, InterpolantAutomatonStates: 500, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 40 MinimizatonAttempts, 1882 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 259.1s InterpolantComputationTime, 2486 NumberOfCodeBlocks, 2469 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 2999 ConstructedInterpolants, 228 QuantifiedInterpolants, 55274 SizeOfPredicates, 344 NumberOfNonLiveVariables, 5569 ConjunctsInSsa, 840 ConjunctsInUnsatCore, 77 InterpolantComputations, 22 PerfectInterpolantSequences, 1656/2114 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 4.3s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 6, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 43, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 21, TOOLS_POST_TIME: 0.7s, TOOLS_POST_CALL_APPLICATIONS: 36, TOOLS_POST_CALL_TIME: 2.4s, TOOLS_POST_RETURN_APPLICATIONS: 24, TOOLS_POST_RETURN_TIME: 0.3s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 81, TOOLS_QUANTIFIERELIM_TIME: 3.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.2s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 104, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 45, DOMAIN_JOIN_TIME: 0.7s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 43, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 24, CALL_SUMMARIZER_CACHE_MISSES: 3, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 472, DAG_COMPRESSION_RETAINED_NODES: 118, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 37 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-26 01:02:32,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f08dc094-dfc3-4505-b0f2-6b50cf776457/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE