./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 2329fc70 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_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f --- 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-2329fc7 [2022-12-14 09:53:49,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:53:49,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:53:49,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:53:49,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:53:49,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:53:49,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:53:49,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:53:49,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:53:49,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:53:49,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:53:49,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:53:49,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:53:49,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:53:49,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:53:49,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:53:49,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:53:49,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:53:49,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:53:49,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:53:49,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:53:49,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:53:49,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:53:49,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:53:49,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:53:49,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:53:49,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:53:49,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:53:49,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:53:49,815 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:53:49,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:53:49,816 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:53:49,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:53:49,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:53:49,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:53:49,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:53:49,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:53:49,819 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:53:49,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:53:49,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:53:49,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:53:49,822 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2022-12-14 09:53:49,842 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:53:49,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:53:49,846 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:53:49,846 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:53:49,847 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:53:49,847 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:53:49,847 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:53:49,848 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:53:49,848 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:53:49,848 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:53:49,848 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:53:49,848 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:53:49,849 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:53:49,849 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:53:49,849 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:53:49,849 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:53:49,849 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:53:49,850 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:53:49,850 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 09:53:49,850 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 09:53:49,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:53:49,851 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:53:49,851 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 09:53:49,851 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:53:49,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:53:49,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:53:49,852 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 09:53:49,852 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 09:53:49,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:53:49,852 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 09:53:49,853 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:53:49,853 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:53:49,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:53:49,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:53:49,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:53:49,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:53:49,854 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:53:49,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:53:49,854 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:53:49,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:53:49,855 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:53:49,855 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_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f [2022-12-14 09:53:50,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:53:50,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:53:50,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:53:50,062 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:53:50,062 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:53:50,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2022-12-14 09:53:52,540 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:53:52,715 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:53:52,716 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2022-12-14 09:53:52,724 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/data/3fb7ccd46/a3ebe207fe5a4ee4acea6a059bb6ced3/FLAGafb1a237c [2022-12-14 09:53:53,108 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/data/3fb7ccd46/a3ebe207fe5a4ee4acea6a059bb6ced3 [2022-12-14 09:53:53,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:53:53,111 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:53:53,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:53:53,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:53:53,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:53:53,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:53:53" (1/1) ... [2022-12-14 09:53:53,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50e4df57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:53:53, skipping insertion in model container [2022-12-14 09:53:53,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:53:53" (1/1) ... [2022-12-14 09:53:53,122 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:53:53,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:53:53,310 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_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2022-12-14 09:53:53,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:53:53,338 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:53:53,359 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_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2022-12-14 09:53:53,369 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:53:53,385 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:53:53,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:53:53 WrapperNode [2022-12-14 09:53:53,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:53:53,386 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:53:53,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:53:53,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:53:53,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:53:53" (1/1) ... [2022-12-14 09:53:53,401 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:53:53" (1/1) ... [2022-12-14 09:53:53,418 INFO L138 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 203 [2022-12-14 09:53:53,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:53:53,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:53:53,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:53:53,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:53:53,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:53:53" (1/1) ... [2022-12-14 09:53:53,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:53:53" (1/1) ... [2022-12-14 09:53:53,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:53:53" (1/1) ... [2022-12-14 09:53:53,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:53:53" (1/1) ... [2022-12-14 09:53:53,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:53:53" (1/1) ... [2022-12-14 09:53:53,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:53:53" (1/1) ... [2022-12-14 09:53:53,444 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:53:53" (1/1) ... [2022-12-14 09:53:53,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:53:53" (1/1) ... [2022-12-14 09:53:53,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:53:53,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:53:53,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:53:53,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:53:53,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:53:53" (1/1) ... [2022-12-14 09:53:53,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:53:53,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:53:53,473 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:53:53,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:53:53,502 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2022-12-14 09:53:53,503 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2022-12-14 09:53:53,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 09:53:53,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:53:53,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 09:53:53,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 09:53:53,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 09:53:53,505 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2022-12-14 09:53:53,505 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2022-12-14 09:53:53,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 09:53:53,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 09:53:53,505 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2022-12-14 09:53:53,505 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2022-12-14 09:53:53,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:53:53,506 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2022-12-14 09:53:53,506 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2022-12-14 09:53:53,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:53:53,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:53:53,608 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:53:53,610 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:53:54,014 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:53:54,054 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:53:54,054 INFO L300 CfgBuilder]: Removed 33 assume(true) statements. [2022-12-14 09:53:54,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:53:54 BoogieIcfgContainer [2022-12-14 09:53:54,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:53:54,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:53:54,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:53:54,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:53:54,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:53:53" (1/3) ... [2022-12-14 09:53:54,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b9496a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:53:54, skipping insertion in model container [2022-12-14 09:53:54,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:53:53" (2/3) ... [2022-12-14 09:53:54,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b9496a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:53:54, skipping insertion in model container [2022-12-14 09:53:54,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:53:54" (3/3) ... [2022-12-14 09:53:54,061 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2022-12-14 09:53:54,075 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:53:54,075 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 83 error locations. [2022-12-14 09:53:54,107 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:53:54,112 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;@1bcae013, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:53:54,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 83 error locations. [2022-12-14 09:53:54,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 194 states, 91 states have (on average 2.340659340659341) internal successors, (213), 181 states have internal predecessors, (213), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-12-14 09:53:54,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 09:53:54,119 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:53:54,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 09:53:54,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-12-14 09:53:54,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:53:54,124 INFO L85 PathProgramCache]: Analyzing trace with hash 531654, now seen corresponding path program 1 times [2022-12-14 09:53:54,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:53:54,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455504394] [2022-12-14 09:53:54,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:53:54,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:53:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:53:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:53:54,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:53:54,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455504394] [2022-12-14 09:53:54,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455504394] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:53:54,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:53:54,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:53:54,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323236148] [2022-12-14 09:53:54,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:53:54,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 09:53:54,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:53:54,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 09:53:54,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 09:53:54,264 INFO L87 Difference]: Start difference. First operand has 194 states, 91 states have (on average 2.340659340659341) internal successors, (213), 181 states have internal predecessors, (213), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:53:54,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:53:54,338 INFO L93 Difference]: Finished difference Result 193 states and 214 transitions. [2022-12-14 09:53:54,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 09:53:54,341 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 09:53:54,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:53:54,349 INFO L225 Difference]: With dead ends: 193 [2022-12-14 09:53:54,350 INFO L226 Difference]: Without dead ends: 192 [2022-12-14 09:53:54,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 09:53:54,354 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:53:54,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 184 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:53:54,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-12-14 09:53:54,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-12-14 09:53:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 89 states have (on average 2.101123595505618) internal successors, (187), 179 states have internal predecessors, (187), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 09:53:54,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 213 transitions. [2022-12-14 09:53:54,403 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 213 transitions. Word has length 3 [2022-12-14 09:53:54,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:53:54,403 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 213 transitions. [2022-12-14 09:53:54,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:53:54,403 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 213 transitions. [2022-12-14 09:53:54,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 09:53:54,404 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:53:54,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 09:53:54,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:53:54,404 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-12-14 09:53:54,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:53:54,405 INFO L85 PathProgramCache]: Analyzing trace with hash 16782747, now seen corresponding path program 1 times [2022-12-14 09:53:54,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:53:54,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168713359] [2022-12-14 09:53:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:53:54,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:53:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:53:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:53:54,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:53:54,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168713359] [2022-12-14 09:53:54,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168713359] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:53:54,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:53:54,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:53:54,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469064479] [2022-12-14 09:53:54,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:53:54,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:53:54,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:53:54,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:53:54,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:53:54,505 INFO L87 Difference]: Start difference. First operand 192 states and 213 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:53:54,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:53:54,630 INFO L93 Difference]: Finished difference Result 190 states and 211 transitions. [2022-12-14 09:53:54,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:53:54,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 09:53:54,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:53:54,632 INFO L225 Difference]: With dead ends: 190 [2022-12-14 09:53:54,632 INFO L226 Difference]: Without dead ends: 190 [2022-12-14 09:53:54,633 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 [2022-12-14 09:53:54,633 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 13 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:53:54,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 288 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:53:54,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-12-14 09:53:54,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2022-12-14 09:53:54,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 177 states have internal predecessors, (185), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 09:53:54,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 211 transitions. [2022-12-14 09:53:54,642 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 211 transitions. Word has length 4 [2022-12-14 09:53:54,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:53:54,642 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 211 transitions. [2022-12-14 09:53:54,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:53:54,642 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 211 transitions. [2022-12-14 09:53:54,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 09:53:54,643 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:53:54,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 09:53:54,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 09:53:54,643 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-12-14 09:53:54,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:53:54,644 INFO L85 PathProgramCache]: Analyzing trace with hash 16782748, now seen corresponding path program 1 times [2022-12-14 09:53:54,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:53:54,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763457334] [2022-12-14 09:53:54,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:53:54,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:53:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:53:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:53:54,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:53:54,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763457334] [2022-12-14 09:53:54,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763457334] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:53:54,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:53:54,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:53:54,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842285908] [2022-12-14 09:53:54,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:53:54,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:53:54,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:53:54,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:53:54,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:53:54,722 INFO L87 Difference]: Start difference. First operand 190 states and 211 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:53:54,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:53:54,840 INFO L93 Difference]: Finished difference Result 188 states and 209 transitions. [2022-12-14 09:53:54,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:53:54,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 09:53:54,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:53:54,842 INFO L225 Difference]: With dead ends: 188 [2022-12-14 09:53:54,842 INFO L226 Difference]: Without dead ends: 188 [2022-12-14 09:53:54,842 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 [2022-12-14 09:53:54,844 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 11 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:53:54,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 291 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:53:54,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-12-14 09:53:54,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-12-14 09:53:54,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 89 states have (on average 2.056179775280899) internal successors, (183), 175 states have internal predecessors, (183), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 09:53:54,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 209 transitions. [2022-12-14 09:53:54,855 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 209 transitions. Word has length 4 [2022-12-14 09:53:54,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:53:54,855 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 209 transitions. [2022-12-14 09:53:54,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:53:54,856 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 209 transitions. [2022-12-14 09:53:54,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:53:54,856 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:53:54,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 09:53:54,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 09:53:54,856 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting chain_nodeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-12-14 09:53:54,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:53:54,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1051633748, now seen corresponding path program 1 times [2022-12-14 09:53:54,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:53:54,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560219741] [2022-12-14 09:53:54,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:53:54,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:53:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:53:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:53:55,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:53:55,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560219741] [2022-12-14 09:53:55,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560219741] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:53:55,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:53:55,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:53:55,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968652333] [2022-12-14 09:53:55,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:53:55,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:53:55,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:53:55,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:53:55,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:53:55,022 INFO L87 Difference]: Start difference. First operand 188 states and 209 transitions. Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:53:55,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:53:55,223 INFO L93 Difference]: Finished difference Result 183 states and 204 transitions. [2022-12-14 09:53:55,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:53:55,224 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 09:53:55,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:53:55,224 INFO L225 Difference]: With dead ends: 183 [2022-12-14 09:53:55,224 INFO L226 Difference]: Without dead ends: 183 [2022-12-14 09:53:55,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:53:55,225 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 36 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:53:55,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 578 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:53:55,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-12-14 09:53:55,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-12-14 09:53:55,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 89 states have (on average 2.0) internal successors, (178), 170 states have internal predecessors, (178), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 09:53:55,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 204 transitions. [2022-12-14 09:53:55,231 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 204 transitions. Word has length 6 [2022-12-14 09:53:55,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:53:55,231 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 204 transitions. [2022-12-14 09:53:55,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:53:55,232 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 204 transitions. [2022-12-14 09:53:55,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:53:55,232 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:53:55,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 09:53:55,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 09:53:55,232 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting chain_nodeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-12-14 09:53:55,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:53:55,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1051633747, now seen corresponding path program 1 times [2022-12-14 09:53:55,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:53:55,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589454060] [2022-12-14 09:53:55,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:53:55,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:53:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:53:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:53:55,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:53:55,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589454060] [2022-12-14 09:53:55,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589454060] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:53:55,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:53:55,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:53:55,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121086859] [2022-12-14 09:53:55,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:53:55,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:53:55,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:53:55,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:53:55,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:53:55,378 INFO L87 Difference]: Start difference. First operand 183 states and 204 transitions. Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:53:55,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:53:55,597 INFO L93 Difference]: Finished difference Result 178 states and 199 transitions. [2022-12-14 09:53:55,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:53:55,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 09:53:55,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:53:55,599 INFO L225 Difference]: With dead ends: 178 [2022-12-14 09:53:55,599 INFO L226 Difference]: Without dead ends: 178 [2022-12-14 09:53:55,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:53:55,600 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 29 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:53:55,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 408 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:53:55,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-12-14 09:53:55,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2022-12-14 09:53:55,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 89 states have (on average 1.9438202247191012) internal successors, (173), 165 states have internal predecessors, (173), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 09:53:55,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 199 transitions. [2022-12-14 09:53:55,608 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 199 transitions. Word has length 6 [2022-12-14 09:53:55,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:53:55,608 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 199 transitions. [2022-12-14 09:53:55,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:53:55,609 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 199 transitions. [2022-12-14 09:53:55,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 09:53:55,609 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:53:55,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:53:55,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 09:53:55,609 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting chain_nodeErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-12-14 09:53:55,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:53:55,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1759092314, now seen corresponding path program 1 times [2022-12-14 09:53:55,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:53:55,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929015427] [2022-12-14 09:53:55,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:53:55,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:53:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:53:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:53:55,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:53:55,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929015427] [2022-12-14 09:53:55,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929015427] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:53:55,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:53:55,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:53:55,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749378582] [2022-12-14 09:53:55,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:53:55,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:53:55,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:53:55,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:53:55,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:53:55,666 INFO L87 Difference]: Start difference. First operand 178 states and 199 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:53:55,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:53:55,775 INFO L93 Difference]: Finished difference Result 177 states and 198 transitions. [2022-12-14 09:53:55,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:53:55,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 09:53:55,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:53:55,777 INFO L225 Difference]: With dead ends: 177 [2022-12-14 09:53:55,777 INFO L226 Difference]: Without dead ends: 177 [2022-12-14 09:53:55,777 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 [2022-12-14 09:53:55,778 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 8 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:53:55,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 386 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:53:55,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-12-14 09:53:55,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-12-14 09:53:55,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 89 states have (on average 1.9325842696629214) internal successors, (172), 164 states have internal predecessors, (172), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 09:53:55,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 198 transitions. [2022-12-14 09:53:55,786 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 198 transitions. Word has length 7 [2022-12-14 09:53:55,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:53:55,786 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 198 transitions. [2022-12-14 09:53:55,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:53:55,787 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 198 transitions. [2022-12-14 09:53:55,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 09:53:55,787 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:53:55,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:53:55,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 09:53:55,787 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting chain_nodeErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-12-14 09:53:55,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:53:55,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1759092315, now seen corresponding path program 1 times [2022-12-14 09:53:55,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:53:55,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347314235] [2022-12-14 09:53:55,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:53:55,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:53:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:53:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:53:55,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:53:55,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347314235] [2022-12-14 09:53:55,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347314235] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:53:55,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:53:55,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:53:55,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178204305] [2022-12-14 09:53:55,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:53:55,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:53:55,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:53:55,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:53:55,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:53:55,871 INFO L87 Difference]: Start difference. First operand 177 states and 198 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:53:56,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:53:56,004 INFO L93 Difference]: Finished difference Result 176 states and 197 transitions. [2022-12-14 09:53:56,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:53:56,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 09:53:56,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:53:56,006 INFO L225 Difference]: With dead ends: 176 [2022-12-14 09:53:56,006 INFO L226 Difference]: Without dead ends: 176 [2022-12-14 09:53:56,006 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 [2022-12-14 09:53:56,007 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 6 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:53:56,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 392 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:53:56,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-12-14 09:53:56,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-12-14 09:53:56,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 89 states have (on average 1.9213483146067416) internal successors, (171), 163 states have internal predecessors, (171), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 09:53:56,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 197 transitions. [2022-12-14 09:53:56,014 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 197 transitions. Word has length 7 [2022-12-14 09:53:56,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:53:56,015 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 197 transitions. [2022-12-14 09:53:56,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:53:56,015 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 197 transitions. [2022-12-14 09:53:56,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 09:53:56,015 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:53:56,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:53:56,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 09:53:56,016 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-12-14 09:53:56,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:53:56,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1220273631, now seen corresponding path program 1 times [2022-12-14 09:53:56,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:53:56,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771423060] [2022-12-14 09:53:56,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:53:56,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:53:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:53:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:53:56,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:53:56,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771423060] [2022-12-14 09:53:56,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771423060] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:53:56,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:53:56,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:53:56,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871700238] [2022-12-14 09:53:56,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:53:56,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:53:56,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:53:56,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:53:56,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:53:56,205 INFO L87 Difference]: Start difference. First operand 176 states and 197 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 09:53:56,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:53:56,441 INFO L93 Difference]: Finished difference Result 175 states and 196 transitions. [2022-12-14 09:53:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:53:56,441 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-12-14 09:53:56,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:53:56,442 INFO L225 Difference]: With dead ends: 175 [2022-12-14 09:53:56,442 INFO L226 Difference]: Without dead ends: 175 [2022-12-14 09:53:56,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:53:56,443 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 153 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:53:56,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 296 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:53:56,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-12-14 09:53:56,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-12-14 09:53:56,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 89 states have (on average 1.9101123595505618) internal successors, (170), 162 states have internal predecessors, (170), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 09:53:56,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 196 transitions. [2022-12-14 09:53:56,447 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 196 transitions. Word has length 13 [2022-12-14 09:53:56,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:53:56,448 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 196 transitions. [2022-12-14 09:53:56,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 09:53:56,449 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 196 transitions. [2022-12-14 09:53:56,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 09:53:56,449 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:53:56,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:53:56,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 09:53:56,450 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-12-14 09:53:56,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:53:56,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1220273630, now seen corresponding path program 1 times [2022-12-14 09:53:56,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:53:56,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160909165] [2022-12-14 09:53:56,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:53:56,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:53:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:53:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:53:56,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:53:56,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160909165] [2022-12-14 09:53:56,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160909165] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:53:56,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:53:56,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:53:56,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29405035] [2022-12-14 09:53:56,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:53:56,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 09:53:56,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:53:56,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 09:53:56,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:53:56,853 INFO L87 Difference]: Start difference. First operand 175 states and 196 transitions. Second operand has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 09:53:57,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:53:57,522 INFO L93 Difference]: Finished difference Result 174 states and 195 transitions. [2022-12-14 09:53:57,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:53:57,523 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-12-14 09:53:57,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:53:57,523 INFO L225 Difference]: With dead ends: 174 [2022-12-14 09:53:57,523 INFO L226 Difference]: Without dead ends: 174 [2022-12-14 09:53:57,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:53:57,524 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 293 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:53:57,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 135 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 09:53:57,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-12-14 09:53:57,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-12-14 09:53:57,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 89 states have (on average 1.898876404494382) internal successors, (169), 161 states have internal predecessors, (169), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 09:53:57,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 195 transitions. [2022-12-14 09:53:57,527 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 195 transitions. Word has length 13 [2022-12-14 09:53:57,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:53:57,528 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 195 transitions. [2022-12-14 09:53:57,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 09:53:57,528 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 195 transitions. [2022-12-14 09:53:57,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 09:53:57,528 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:53:57,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:53:57,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 09:53:57,528 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-12-14 09:53:57,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:53:57,529 INFO L85 PathProgramCache]: Analyzing trace with hash -141578134, now seen corresponding path program 1 times [2022-12-14 09:53:57,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:53:57,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203396157] [2022-12-14 09:53:57,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:53:57,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:53:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:53:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:53:57,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:53:57,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203396157] [2022-12-14 09:53:57,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203396157] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:53:57,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:53:57,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:53:57,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101580277] [2022-12-14 09:53:57,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:53:57,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 09:53:57,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:53:57,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 09:53:57,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:53:57,736 INFO L87 Difference]: Start difference. First operand 174 states and 195 transitions. Second operand has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 09:53:58,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:53:58,093 INFO L93 Difference]: Finished difference Result 182 states and 207 transitions. [2022-12-14 09:53:58,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:53:58,093 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-12-14 09:53:58,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:53:58,095 INFO L225 Difference]: With dead ends: 182 [2022-12-14 09:53:58,095 INFO L226 Difference]: Without dead ends: 182 [2022-12-14 09:53:58,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:53:58,096 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 83 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:53:58,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 366 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:53:58,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-12-14 09:53:58,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 178. [2022-12-14 09:53:58,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 93 states have (on average 1.881720430107527) internal successors, (175), 164 states have internal predecessors, (175), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 09:53:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 201 transitions. [2022-12-14 09:53:58,102 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 201 transitions. Word has length 17 [2022-12-14 09:53:58,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:53:58,102 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 201 transitions. [2022-12-14 09:53:58,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 09:53:58,102 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 201 transitions. [2022-12-14 09:53:58,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 09:53:58,103 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:53:58,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:53:58,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 09:53:58,103 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-12-14 09:53:58,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:53:58,104 INFO L85 PathProgramCache]: Analyzing trace with hash -141578133, now seen corresponding path program 1 times [2022-12-14 09:53:58,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:53:58,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6122091] [2022-12-14 09:53:58,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:53:58,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:53:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:53:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:53:58,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:53:58,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6122091] [2022-12-14 09:53:58,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6122091] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:53:58,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:53:58,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:53:58,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665658773] [2022-12-14 09:53:58,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:53:58,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 09:53:58,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:53:58,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 09:53:58,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:53:58,633 INFO L87 Difference]: Start difference. First operand 178 states and 201 transitions. Second operand has 9 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 09:53:59,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:53:59,156 INFO L93 Difference]: Finished difference Result 177 states and 199 transitions. [2022-12-14 09:53:59,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:53:59,157 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-12-14 09:53:59,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:53:59,157 INFO L225 Difference]: With dead ends: 177 [2022-12-14 09:53:59,157 INFO L226 Difference]: Without dead ends: 177 [2022-12-14 09:53:59,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:53:59,158 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 179 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:53:59,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 248 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 09:53:59,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-12-14 09:53:59,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-12-14 09:53:59,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 93 states have (on average 1.8602150537634408) internal successors, (173), 163 states have internal predecessors, (173), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 09:53:59,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 199 transitions. [2022-12-14 09:53:59,162 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 199 transitions. Word has length 17 [2022-12-14 09:53:59,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:53:59,163 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 199 transitions. [2022-12-14 09:53:59,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 09:53:59,163 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 199 transitions. [2022-12-14 09:53:59,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 09:53:59,163 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:53:59,163 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:53:59,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 09:53:59,164 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-12-14 09:53:59,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:53:59,164 INFO L85 PathProgramCache]: Analyzing trace with hash 760921862, now seen corresponding path program 1 times [2022-12-14 09:53:59,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:53:59,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479197341] [2022-12-14 09:53:59,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:53:59,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:53:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:53:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 09:53:59,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:53:59,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479197341] [2022-12-14 09:53:59,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479197341] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:53:59,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676892472] [2022-12-14 09:53:59,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:53:59,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:53:59,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:53:59,568 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:53:59,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:53:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:53:59,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 09:53:59,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:53:59,750 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 09:53:59,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 31 [2022-12-14 09:53:59,794 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 9 treesize of output 7 [2022-12-14 09:53:59,808 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_415 Int)) (= |c_#valid| (store |c_old(#valid)| |c_chain_node_alloc_node_~ptr~0#1.base| v_ArrVal_415))) is different from true [2022-12-14 09:53:59,818 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_415 Int)) (= |c_#valid| (store |c_old(#valid)| |c_chain_node_~node~0#1.base| v_ArrVal_415))) is different from true [2022-12-14 09:54:00,271 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:54:00,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-14 09:54:00,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:54:00,375 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 15 treesize of output 19 [2022-12-14 09:54:00,390 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (exists ((v_ArrVal_416 Int)) (= |c_#valid| (store |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base| v_ArrVal_416))) (< |chain_node_alloc_node_~ptr~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-12-14 09:54:00,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,440 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-14 09:54:00,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 21 treesize of output 30 [2022-12-14 09:54:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2022-12-14 09:54:00,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:54:00,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676892472] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:54:00,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [50822859] [2022-12-14 09:54:00,545 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 09:54:00,545 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:54:00,548 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:54:00,552 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:54:00,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:54:00,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-12-14 09:54:00,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,681 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 09:54:00,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-12-14 09:54:00,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:54:00,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:54:00,707 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 [2022-12-14 09:54:00,711 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 [2022-12-14 09:54:00,715 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 15 treesize of output 1 [2022-12-14 09:54:00,726 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 19 treesize of output 1 [2022-12-14 09:54:00,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 09:54:00,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 09:54:00,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,778 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-12-14 09:54:00,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 42 [2022-12-14 09:54:00,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 09:54:00,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,819 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-12-14 09:54:00,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 42 [2022-12-14 09:54:00,836 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 1 [2022-12-14 09:54:00,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,882 INFO L321 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2022-12-14 09:54:00,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 74 [2022-12-14 09:54:00,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,934 INFO L321 Elim1Store]: treesize reduction 66, result has 32.0 percent of original size [2022-12-14 09:54:00,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 56 [2022-12-14 09:54:00,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:00,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-12-14 09:54:00,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:54:01,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:54:01,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,064 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 09:54:01,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-12-14 09:54:01,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:54:01,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-12-14 09:54:01,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:54:01,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 09:54:01,204 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 1 [2022-12-14 09:54:01,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 09:54:01,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,314 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-12-14 09:54:01,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-12-14 09:54:01,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 11 treesize of output 3 [2022-12-14 09:54:01,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 11 treesize of output 3 [2022-12-14 09:54:01,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 15 treesize of output 11 [2022-12-14 09:54:01,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 11 treesize of output 7 [2022-12-14 09:54:01,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,441 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-12-14 09:54:01,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-12-14 09:54:01,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 11 treesize of output 3 [2022-12-14 09:54:01,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 15 treesize of output 11 [2022-12-14 09:54:01,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 11 treesize of output 7 [2022-12-14 09:54:01,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:01,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 11 treesize of output 3 [2022-12-14 09:54:01,642 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-12-14 09:54:01,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 259 treesize of output 248 [2022-12-14 09:54:01,962 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:54:01,964 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:54:02,088 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-12-14 09:54:02,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 259 treesize of output 248 [2022-12-14 09:54:02,369 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:54:02,371 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:54:02,496 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-12-14 09:54:02,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 259 treesize of output 248 [2022-12-14 09:54:02,778 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:54:02,780 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:54:02,781 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:54:02,916 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-12-14 09:54:02,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 259 treesize of output 248 [2022-12-14 09:54:03,155 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:54:03,158 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:54:03,353 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-12-14 09:54:03,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 259 treesize of output 248 [2022-12-14 09:54:03,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:03,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:03,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:03,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:03,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:03,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:03,687 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 09:54:03,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-12-14 09:54:03,701 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 12 for LOIs [2022-12-14 09:54:03,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:54:03,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:54:03,719 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 [2022-12-14 09:54:03,723 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 [2022-12-14 09:54:03,728 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 15 treesize of output 1 [2022-12-14 09:54:03,738 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 19 treesize of output 1 [2022-12-14 09:54:03,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:03,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 09:54:03,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:03,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 09:54:03,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:03,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:54:03,790 INFO L321 Elim1Store]: treesize reduction 16, result has 50.0 percent of original size [2022-12-14 09:54:03,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2022-12-14 09:54:03,800 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 1 [2022-12-14 09:54:03,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:03,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:54:03,826 INFO L321 Elim1Store]: treesize reduction 16, result has 50.0 percent of original size [2022-12-14 09:54:03,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2022-12-14 09:54:03,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:03,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:54:03,856 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 09:54:03,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 38 [2022-12-14 09:54:03,864 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 1 [2022-12-14 09:54:03,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:03,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:54:03,884 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-12-14 09:54:03,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 42 [2022-12-14 09:54:03,889 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:54:06,013 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4374#(and (<= 0 |ULTIMATE.start_create_sll_~#list~0#1.base|) (<= 0 |ULTIMATE.start_create_sll_~pp1#1.offset|) (<= 0 |ULTIMATE.start_create_sll_~pp2#1.base|) (<= 0 |ULTIMATE.start_create_sll_~pp1#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_sll_~#list~0#1.base|) |ULTIMATE.start_create_sll_~#list~0#1.offset|) |ULTIMATE.start_create_sll_#t~mem9#1.offset|) (<= |ULTIMATE.start_create_sll_#in~pp1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#p2~0#1.base|) (= |ULTIMATE.start_main_~#p1~0#1.offset| 0) (<= 0 |ULTIMATE.start_create_sll_#in~pp2#1.base|) (= |ULTIMATE.start_main_~#p2~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_create_sll_~pp1#1.base|) 1)) (<= 0 |ULTIMATE.start_create_sll_#in~pp2#1.offset|) (= |ULTIMATE.start_create_sll_~#list~0#1.offset| 0) (<= |ULTIMATE.start_create_sll_~pp1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#p1~0#1.base|) (= (select |#valid| |ULTIMATE.start_create_sll_~#list~0#1.base|) 1) (= |#NULL.offset| 0) (<= |ULTIMATE.start_create_sll_#in~pp2#1.offset| 0) (<= 0 |ULTIMATE.start_create_sll_#in~pp1#1.base|) (<= 0 |ULTIMATE.start_create_sll_#in~pp1#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_sll_~#list~0#1.base|) |ULTIMATE.start_create_sll_~#list~0#1.offset|) |ULTIMATE.start_create_sll_#t~mem9#1.base|) (<= 0 |ULTIMATE.start_create_sll_~pp2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= (+ |ULTIMATE.start_create_sll_~#list~0#1.offset| 4) (select |#length| |ULTIMATE.start_create_sll_~#list~0#1.base|)) (<= |ULTIMATE.start_create_sll_~pp2#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 09:54:06,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:54:06,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:54:06,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2022-12-14 09:54:06,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345984279] [2022-12-14 09:54:06,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:54:06,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 09:54:06,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:06,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 09:54:06,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=939, Unknown=3, NotChecked=192, Total=1260 [2022-12-14 09:54:06,015 INFO L87 Difference]: Start difference. First operand 177 states and 199 transitions. Second operand has 19 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 17 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 09:54:06,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:06,723 INFO L93 Difference]: Finished difference Result 178 states and 199 transitions. [2022-12-14 09:54:06,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 09:54:06,723 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 17 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2022-12-14 09:54:06,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:06,724 INFO L225 Difference]: With dead ends: 178 [2022-12-14 09:54:06,724 INFO L226 Difference]: Without dead ends: 178 [2022-12-14 09:54:06,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=183, Invalid=1308, Unknown=3, NotChecked=228, Total=1722 [2022-12-14 09:54:06,725 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 142 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 46 mSolverCounterUnsat, 30 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 30 IncrementalHoareTripleChecker+Unknown, 571 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:06,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 518 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 839 Invalid, 30 Unknown, 571 Unchecked, 0.5s Time] [2022-12-14 09:54:06,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-12-14 09:54:06,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 172. [2022-12-14 09:54:06,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 89 states have (on average 1.8764044943820224) internal successors, (167), 159 states have internal predecessors, (167), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 09:54:06,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 193 transitions. [2022-12-14 09:54:06,728 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 193 transitions. Word has length 27 [2022-12-14 09:54:06,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:06,728 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 193 transitions. [2022-12-14 09:54:06,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 17 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 09:54:06,728 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 193 transitions. [2022-12-14 09:54:06,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 09:54:06,729 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:06,729 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:54:06,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:54:06,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:54:06,931 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-12-14 09:54:06,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:06,933 INFO L85 PathProgramCache]: Analyzing trace with hash -478744620, now seen corresponding path program 1 times [2022-12-14 09:54:06,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:06,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135971637] [2022-12-14 09:54:06,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:06,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:54:07,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:07,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135971637] [2022-12-14 09:54:07,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135971637] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:54:07,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531866802] [2022-12-14 09:54:07,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:07,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:54:07,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:54:07,345 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:54:07,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:54:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:07,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 09:54:07,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:54:07,470 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 14 treesize of output 12 [2022-12-14 09:54:07,522 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| (select |c_#valid| |chain_node_~node~0#1.base|))) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2022-12-14 09:54:07,542 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-12-14 09:54:07,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 19 treesize of output 16 [2022-12-14 09:54:07,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 09:54:07,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:07,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:54:07,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531866802] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:54:07,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:54:07,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 13 [2022-12-14 09:54:07,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857572552] [2022-12-14 09:54:07,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:54:07,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:54:07,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:07,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:54:07,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=128, Unknown=1, NotChecked=22, Total=182 [2022-12-14 09:54:07,557 INFO L87 Difference]: Start difference. First operand 172 states and 193 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:54:07,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:07,833 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2022-12-14 09:54:07,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:54:07,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-12-14 09:54:07,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:07,834 INFO L225 Difference]: With dead ends: 175 [2022-12-14 09:54:07,834 INFO L226 Difference]: Without dead ends: 175 [2022-12-14 09:54:07,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=149, Unknown=1, NotChecked=24, Total=210 [2022-12-14 09:54:07,835 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 171 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:07,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 264 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 581 Invalid, 0 Unknown, 193 Unchecked, 0.2s Time] [2022-12-14 09:54:07,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-12-14 09:54:07,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 165. [2022-12-14 09:54:07,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 89 states have (on average 1.797752808988764) internal successors, (160), 152 states have internal predecessors, (160), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 09:54:07,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 186 transitions. [2022-12-14 09:54:07,839 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 186 transitions. Word has length 30 [2022-12-14 09:54:07,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:07,839 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 186 transitions. [2022-12-14 09:54:07,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:54:07,839 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 186 transitions. [2022-12-14 09:54:07,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 09:54:07,840 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:07,840 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:54:07,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:54:08,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:54:08,042 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-12-14 09:54:08,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:08,043 INFO L85 PathProgramCache]: Analyzing trace with hash -478744619, now seen corresponding path program 1 times [2022-12-14 09:54:08,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:08,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183550984] [2022-12-14 09:54:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:08,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:08,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:08,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183550984] [2022-12-14 09:54:08,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183550984] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:54:08,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:54:08,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:54:08,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457300442] [2022-12-14 09:54:08,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:54:08,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:54:08,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:08,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:54:08,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:54:08,323 INFO L87 Difference]: Start difference. First operand 165 states and 186 transitions. Second operand has 8 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:54:08,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:08,658 INFO L93 Difference]: Finished difference Result 187 states and 217 transitions. [2022-12-14 09:54:08,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:54:08,658 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-12-14 09:54:08,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:08,660 INFO L225 Difference]: With dead ends: 187 [2022-12-14 09:54:08,660 INFO L226 Difference]: Without dead ends: 187 [2022-12-14 09:54:08,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:54:08,661 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 315 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:08,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 118 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:54:08,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-12-14 09:54:08,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 165. [2022-12-14 09:54:08,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 94 states have (on average 1.702127659574468) internal successors, (160), 151 states have internal predecessors, (160), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 09:54:08,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 188 transitions. [2022-12-14 09:54:08,667 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 188 transitions. Word has length 30 [2022-12-14 09:54:08,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:08,667 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 188 transitions. [2022-12-14 09:54:08,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:54:08,667 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 188 transitions. [2022-12-14 09:54:08,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 09:54:08,668 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:08,668 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:54:08,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 09:54:08,668 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-12-14 09:54:08,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:08,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1956181111, now seen corresponding path program 1 times [2022-12-14 09:54:08,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:08,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896262591] [2022-12-14 09:54:08,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:08,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:08,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:08,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896262591] [2022-12-14 09:54:08,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896262591] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:54:08,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:54:08,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:54:08,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266755146] [2022-12-14 09:54:08,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:54:08,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:54:08,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:08,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:54:08,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:54:08,941 INFO L87 Difference]: Start difference. First operand 165 states and 188 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:54:09,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:09,191 INFO L93 Difference]: Finished difference Result 168 states and 192 transitions. [2022-12-14 09:54:09,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:54:09,191 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), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2022-12-14 09:54:09,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:09,192 INFO L225 Difference]: With dead ends: 168 [2022-12-14 09:54:09,192 INFO L226 Difference]: Without dead ends: 168 [2022-12-14 09:54:09,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:54:09,192 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 153 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:09,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 234 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:54:09,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-12-14 09:54:09,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 158. [2022-12-14 09:54:09,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 94 states have (on average 1.627659574468085) internal successors, (153), 144 states have internal predecessors, (153), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 09:54:09,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 181 transitions. [2022-12-14 09:54:09,196 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 181 transitions. Word has length 31 [2022-12-14 09:54:09,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:09,197 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 181 transitions. [2022-12-14 09:54:09,197 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), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:54:09,197 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 181 transitions. [2022-12-14 09:54:09,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 09:54:09,197 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:09,197 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:54:09,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 09:54:09,197 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-12-14 09:54:09,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:09,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1956181110, now seen corresponding path program 1 times [2022-12-14 09:54:09,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:09,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841089727] [2022-12-14 09:54:09,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:09,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:09,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:09,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841089727] [2022-12-14 09:54:09,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841089727] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:54:09,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:54:09,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:54:09,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081966972] [2022-12-14 09:54:09,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:54:09,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:54:09,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:09,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:54:09,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:54:09,438 INFO L87 Difference]: Start difference. First operand 158 states and 181 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:54:09,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:09,801 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2022-12-14 09:54:09,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:54:09,801 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), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2022-12-14 09:54:09,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:09,802 INFO L225 Difference]: With dead ends: 187 [2022-12-14 09:54:09,802 INFO L226 Difference]: Without dead ends: 187 [2022-12-14 09:54:09,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:54:09,803 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 265 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:09,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 152 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:54:09,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-12-14 09:54:09,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 163. [2022-12-14 09:54:09,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 104 states have (on average 1.5288461538461537) internal successors, (159), 147 states have internal predecessors, (159), 19 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 09:54:09,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 189 transitions. [2022-12-14 09:54:09,809 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 189 transitions. Word has length 31 [2022-12-14 09:54:09,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:09,809 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 189 transitions. [2022-12-14 09:54:09,810 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), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:54:09,810 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 189 transitions. [2022-12-14 09:54:09,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 09:54:09,810 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:09,811 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2022-12-14 09:54:09,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 09:54:09,811 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-12-14 09:54:09,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:09,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1167856784, now seen corresponding path program 1 times [2022-12-14 09:54:09,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:09,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186099064] [2022-12-14 09:54:09,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:09,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:10,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:10,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186099064] [2022-12-14 09:54:10,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186099064] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:54:10,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418083812] [2022-12-14 09:54:10,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:10,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:54:10,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:54:10,839 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:54:10,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:54:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:10,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-14 09:54:10,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:54:11,001 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 [2022-12-14 09:54:11,106 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:54:11,106 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 1 case distinctions, treesize of input 15 treesize of output 21 [2022-12-14 09:54:11,111 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 [2022-12-14 09:54:11,221 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 09:54:11,221 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 1 case distinctions, treesize of input 28 treesize of output 23 [2022-12-14 09:54:11,261 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:54:11,261 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 24 treesize of output 12 [2022-12-14 09:54:11,436 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_951 (Array Int Int)) (v_ArrVal_950 (Array Int Int))) (and (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_950) |c_chain_node_#in~ppnode#1.base| v_ArrVal_951) |c_#memory_$Pointer$.base|) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-12-14 09:54:11,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:11,462 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-12-14 09:54:11,462 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 3 case distinctions, treesize of input 33 treesize of output 49 [2022-12-14 09:54:11,467 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 [2022-12-14 09:54:11,472 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 6 treesize of output 4 [2022-12-14 09:54:11,515 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 [2022-12-14 09:54:11,577 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 28 treesize of output 20 [2022-12-14 09:54:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-14 09:54:11,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:54:11,698 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:54:11,699 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 19 treesize of output 15 [2022-12-14 09:54:11,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418083812] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:54:11,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [368720659] [2022-12-14 09:54:11,822 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2022-12-14 09:54:11,822 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:54:11,823 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:54:11,823 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:54:11,823 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:54:11,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:11,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:11,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:11,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:11,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:11,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:11,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:11,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:11,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:11,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-12-14 09:54:11,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:11,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:11,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:11,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:11,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:11,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:11,919 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 09:54:11,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-12-14 09:54:11,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:54:11,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:54:11,944 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 [2022-12-14 09:54:11,947 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 [2022-12-14 09:54:11,950 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 15 treesize of output 1 [2022-12-14 09:54:11,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:11,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 09:54:11,964 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 19 treesize of output 1 [2022-12-14 09:54:11,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:11,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 09:54:11,980 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 1 [2022-12-14 09:54:11,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,008 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-12-14 09:54:12,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 42 [2022-12-14 09:54:12,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,041 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-12-14 09:54:12,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 42 [2022-12-14 09:54:12,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,094 INFO L321 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2022-12-14 09:54:12,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 74 [2022-12-14 09:54:12,109 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 1 [2022-12-14 09:54:12,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,143 INFO L321 Elim1Store]: treesize reduction 66, result has 32.0 percent of original size [2022-12-14 09:54:12,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 56 [2022-12-14 09:54:12,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:54:12,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:54:12,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-12-14 09:54:12,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,240 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 09:54:12,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-12-14 09:54:12,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:54:12,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-12-14 09:54:12,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:54:12,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 09:54:12,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 09:54:12,350 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 1 [2022-12-14 09:54:12,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-12-14 09:54:12,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-12-14 09:54:12,422 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 1 [2022-12-14 09:54:12,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,471 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-12-14 09:54:12,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-12-14 09:54:12,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 22 treesize of output 16 [2022-12-14 09:54:12,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-12-14 09:54:12,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 7 [2022-12-14 09:54:12,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 7 [2022-12-14 09:54:12,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,596 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-12-14 09:54:12,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-12-14 09:54:12,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 7 [2022-12-14 09:54:12,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-12-14 09:54:12,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 22 treesize of output 16 [2022-12-14 09:54:12,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 7 [2022-12-14 09:54:12,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:54:12,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,833 INFO L321 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-12-14 09:54:12,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:54:12,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,882 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-12-14 09:54:12,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-12-14 09:54:12,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:12,930 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 09:54:12,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-12-14 09:54:12,942 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 140 for LOIs [2022-12-14 09:54:13,534 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 70 for LOIs [2022-12-14 09:54:13,580 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 60 for LOIs [2022-12-14 09:54:13,591 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:54:27,488 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6437#(and (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_34| Int)) (and (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_34|) 0) (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~#list~0#1.base_34|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_34|) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_34|) (not (= 2 |v_ULTIMATE.start_create_sll_~#list~0#1.base_34|)) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_34| 0)))) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_16| Int)) (and (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_19|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_19|) 0) 0) (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_16|)) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_16| 0)) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_16| 2)) (<= 0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_19|) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_16|) (<= 0 |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_16|) (= (select |#valid| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_19|) 1) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_19|) 0) 0) (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_19|)) (= (select |#valid| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_16|) 1) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_19| 2)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_19| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_16|)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_19| 0)))) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:54:27,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:54:27,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:54:27,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 36 [2022-12-14 09:54:27,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943322543] [2022-12-14 09:54:27,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:54:27,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 09:54:27,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:27,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 09:54:27,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=3410, Unknown=12, NotChecked=118, Total=3782 [2022-12-14 09:54:27,492 INFO L87 Difference]: Start difference. First operand 163 states and 189 transitions. Second operand has 36 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 32 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 09:54:30,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:30,054 INFO L93 Difference]: Finished difference Result 244 states and 284 transitions. [2022-12-14 09:54:30,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 09:54:30,055 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 32 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-12-14 09:54:30,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:30,056 INFO L225 Difference]: With dead ends: 244 [2022-12-14 09:54:30,056 INFO L226 Difference]: Without dead ends: 244 [2022-12-14 09:54:30,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=444, Invalid=5864, Unknown=16, NotChecked=156, Total=6480 [2022-12-14 09:54:30,057 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 332 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 2772 mSolverCounterSat, 60 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2772 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:30,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 1030 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2772 Invalid, 4 Unknown, 254 Unchecked, 1.5s Time] [2022-12-14 09:54:30,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-12-14 09:54:30,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 174. [2022-12-14 09:54:30,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 114 states have (on average 1.543859649122807) internal successors, (176), 157 states have internal predecessors, (176), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 09:54:30,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 206 transitions. [2022-12-14 09:54:30,061 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 206 transitions. Word has length 36 [2022-12-14 09:54:30,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:30,061 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 206 transitions. [2022-12-14 09:54:30,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 32 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 09:54:30,061 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 206 transitions. [2022-12-14 09:54:30,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 09:54:30,062 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:30,062 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2022-12-14 09:54:30,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 09:54:30,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 09:54:30,263 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-12-14 09:54:30,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:30,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1312980954, now seen corresponding path program 1 times [2022-12-14 09:54:30,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:30,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434292032] [2022-12-14 09:54:30,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:30,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:30,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:32,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:32,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434292032] [2022-12-14 09:54:32,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434292032] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:54:32,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436519282] [2022-12-14 09:54:32,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:32,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:54:32,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:54:32,044 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:54:32,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:54:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:32,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 09:54:32,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:54:32,241 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 [2022-12-14 09:54:32,419 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 09:54:32,419 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 1 case distinctions, treesize of input 24 treesize of output 19 [2022-12-14 09:54:32,525 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-12-14 09:54:32,526 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 45 [2022-12-14 09:54:32,533 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 7 treesize of output 5 [2022-12-14 09:54:32,554 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 20 treesize of output 16 [2022-12-14 09:54:32,571 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 [2022-12-14 09:54:32,934 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1119 (Array Int Int)) (v_ArrVal_1118 (Array Int Int)) (|chain_node_~node~0#1.base| Int)) (and (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_1118) |c_chain_node_#in~ppnode#1.base| v_ArrVal_1119) |c_#memory_$Pointer$.base|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2022-12-14 09:54:32,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:32,965 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-12-14 09:54:32,965 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 3 case distinctions, treesize of input 54 treesize of output 68 [2022-12-14 09:54:32,974 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 [2022-12-14 09:54:32,992 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 [2022-12-14 09:54:32,998 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 09:54:32,999 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 11 treesize of output 11 [2022-12-14 09:54:33,060 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 [2022-12-14 09:54:33,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:54:33,273 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 57 treesize of output 49 [2022-12-14 09:54:33,279 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:54:33,279 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 45 treesize of output 41 [2022-12-14 09:54:33,288 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:54:33,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2022-12-14 09:54:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-14 09:54:33,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:54:33,770 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-14 09:54:33,770 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 24 treesize of output 23 [2022-12-14 09:54:33,819 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 [2022-12-14 09:54:34,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436519282] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:54:34,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1153402254] [2022-12-14 09:54:34,014 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-12-14 09:54:34,014 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:54:34,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:54:34,014 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:54:34,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:54:34,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-12-14 09:54:34,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,088 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 09:54:34,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-12-14 09:54:34,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:54:34,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:54:34,111 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 15 treesize of output 1 [2022-12-14 09:54:34,114 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 [2022-12-14 09:54:34,117 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 [2022-12-14 09:54:34,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 09:54:34,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 09:54:34,136 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 19 treesize of output 1 [2022-12-14 09:54:34,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,167 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-12-14 09:54:34,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 42 [2022-12-14 09:54:34,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,196 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-12-14 09:54:34,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 42 [2022-12-14 09:54:34,205 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 1 [2022-12-14 09:54:34,215 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 1 [2022-12-14 09:54:34,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,251 INFO L321 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2022-12-14 09:54:34,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 74 [2022-12-14 09:54:34,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,294 INFO L321 Elim1Store]: treesize reduction 66, result has 32.0 percent of original size [2022-12-14 09:54:34,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 56 [2022-12-14 09:54:34,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:54:34,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:54:34,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-12-14 09:54:34,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,378 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 09:54:34,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-12-14 09:54:34,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-12-14 09:54:34,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:54:34,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:54:34,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 09:54:34,468 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 1 [2022-12-14 09:54:34,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 09:54:34,524 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 1 [2022-12-14 09:54:34,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-12-14 09:54:34,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-12-14 09:54:34,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,597 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-12-14 09:54:34,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-12-14 09:54:34,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 22 treesize of output 16 [2022-12-14 09:54:34,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 7 [2022-12-14 09:54:34,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 7 [2022-12-14 09:54:34,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-12-14 09:54:34,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,713 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-12-14 09:54:34,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-12-14 09:54:34,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 7 [2022-12-14 09:54:34,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 22 treesize of output 16 [2022-12-14 09:54:34,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 7 [2022-12-14 09:54:34,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-12-14 09:54:34,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:54:34,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,937 INFO L321 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-12-14 09:54:34,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:54:34,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:34,989 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-12-14 09:54:34,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-12-14 09:54:35,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:35,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:35,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:35,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:35,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:35,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:35,041 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 09:54:35,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-12-14 09:54:35,057 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 141 for LOIs [2022-12-14 09:54:35,725 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 70 for LOIs [2022-12-14 09:54:35,804 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 75 for LOIs [2022-12-14 09:54:35,828 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:54:51,953 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7121#(and (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_38| Int)) (and (not (= 2 |v_ULTIMATE.start_create_sll_~#list~0#1.base_38|)) (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~#list~0#1.base_38|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_38|) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_38| 0)) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_38|) (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_38|) 0))) (= |#NULL.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (or (exists ((|v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24| Int)) (and (= (select |#valid| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|) 1) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|) 0) 0) (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|) (exists ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_27| Int)) (and (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_27|) (<= 0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_27|) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_27| 2)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_27| 0)) (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_27|)) (= (select |#valid| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_27|) 1) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_27| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|)) (not (= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_27|) 0))))) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|) 0) 0) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24| 2)) (<= 0 |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24| 0)))) (exists ((|v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24| Int)) (and (exists ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_27| Int)) (and (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_27|) (<= 0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_27|) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_27| 2)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_27| 0)) (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_27|)) (= (select |#valid| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_27|) 1) (not (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_27|) 0) 0)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_27| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|)))) (= (select |#valid| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|) 1) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|) 0) 0) (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|) 0) 0) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24| 2)) (<= 0 |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24| 0))))))' at error location [2022-12-14 09:54:51,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:54:51,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:54:51,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-12-14 09:54:51,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915394813] [2022-12-14 09:54:51,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:54:51,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 09:54:51,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:51,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 09:54:51,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=5116, Unknown=5, NotChecked=144, Total=5550 [2022-12-14 09:54:51,956 INFO L87 Difference]: Start difference. First operand 174 states and 206 transitions. Second operand has 44 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 39 states have internal predecessors, (63), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 09:54:56,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:56,884 INFO L93 Difference]: Finished difference Result 277 states and 328 transitions. [2022-12-14 09:54:56,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 09:54:56,884 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 39 states have internal predecessors, (63), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2022-12-14 09:54:56,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:56,886 INFO L225 Difference]: With dead ends: 277 [2022-12-14 09:54:56,886 INFO L226 Difference]: Without dead ends: 277 [2022-12-14 09:54:56,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1883 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=613, Invalid=9285, Unknown=6, NotChecked=196, Total=10100 [2022-12-14 09:54:56,888 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 661 mSDsluCounter, 1461 mSDsCounter, 0 mSdLazyCounter, 4061 mSolverCounterSat, 143 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 4489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 4061 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:56,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 1525 Invalid, 4489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 4061 Invalid, 2 Unknown, 283 Unchecked, 2.4s Time] [2022-12-14 09:54:56,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-12-14 09:54:56,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 186. [2022-12-14 09:54:56,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 124 states have (on average 1.5483870967741935) internal successors, (192), 168 states have internal predecessors, (192), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:54:56,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 224 transitions. [2022-12-14 09:54:56,895 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 224 transitions. Word has length 38 [2022-12-14 09:54:56,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:56,895 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 224 transitions. [2022-12-14 09:54:56,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 39 states have internal predecessors, (63), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 09:54:56,896 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 224 transitions. [2022-12-14 09:54:56,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 09:54:56,896 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:56,897 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2022-12-14 09:54:56,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 09:54:57,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 09:54:57,098 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-12-14 09:54:57,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:57,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1312970018, now seen corresponding path program 1 times [2022-12-14 09:54:57,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:57,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552188363] [2022-12-14 09:54:57,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:57,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:58,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:58,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:58,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552188363] [2022-12-14 09:54:58,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552188363] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:54:58,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697559077] [2022-12-14 09:54:58,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:58,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:54:58,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:54:58,088 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:54:58,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 09:54:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:58,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-14 09:54:58,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:54:58,220 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 09:54:58,221 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-14 09:54:58,329 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 [2022-12-14 09:54:58,370 INFO L321 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2022-12-14 09:54:58,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2022-12-14 09:54:58,464 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:54:58,464 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 1 case distinctions, treesize of input 24 treesize of output 28 [2022-12-14 09:54:58,474 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 14 treesize of output 10 [2022-12-14 09:54:58,658 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 09:54:58,658 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 1 case distinctions, treesize of input 48 treesize of output 39 [2022-12-14 09:54:58,743 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:54:58,743 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 44 treesize of output 28 [2022-12-14 09:54:58,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:59,020 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-12-14 09:54:59,021 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 3 case distinctions, treesize of input 53 treesize of output 67 [2022-12-14 09:54:59,054 INFO L321 Elim1Store]: treesize reduction 38, result has 59.6 percent of original size [2022-12-14 09:54:59,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 86 [2022-12-14 09:54:59,264 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 29 treesize of output 25 [2022-12-14 09:54:59,272 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 36 treesize of output 30 [2022-12-14 09:54:59,607 INFO L321 Elim1Store]: treesize reduction 154, result has 38.9 percent of original size [2022-12-14 09:54:59,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 80 treesize of output 158 [2022-12-14 09:55:00,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2022-12-14 09:55:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:05,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:06,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697559077] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:55:06,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [792103390] [2022-12-14 09:55:06,115 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-12-14 09:55:06,115 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:55:06,115 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:55:06,115 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:55:06,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:55:06,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-12-14 09:55:06,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,207 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 09:55:06,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-12-14 09:55:06,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:55:06,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:55:06,229 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 [2022-12-14 09:55:06,233 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 [2022-12-14 09:55:06,236 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 15 treesize of output 1 [2022-12-14 09:55:06,250 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 19 treesize of output 1 [2022-12-14 09:55:06,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 09:55:06,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 09:55:06,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,298 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-12-14 09:55:06,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 42 [2022-12-14 09:55:06,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,329 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-12-14 09:55:06,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 42 [2022-12-14 09:55:06,339 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 1 [2022-12-14 09:55:06,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,380 INFO L321 Elim1Store]: treesize reduction 66, result has 32.0 percent of original size [2022-12-14 09:55:06,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 56 [2022-12-14 09:55:06,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,434 INFO L321 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2022-12-14 09:55:06,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 74 [2022-12-14 09:55:06,448 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 1 [2022-12-14 09:55:06,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:55:06,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-12-14 09:55:06,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:55:06,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,549 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 09:55:06,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-12-14 09:55:06,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:55:06,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-12-14 09:55:06,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:55:06,643 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 1 [2022-12-14 09:55:06,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 09:55:06,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 09:55:06,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-12-14 09:55:06,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-12-14 09:55:06,744 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 1 [2022-12-14 09:55:06,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,799 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-12-14 09:55:06,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-12-14 09:55:06,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 22 treesize of output 16 [2022-12-14 09:55:06,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 7 [2022-12-14 09:55:06,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 7 [2022-12-14 09:55:06,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-12-14 09:55:06,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,907 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-12-14 09:55:06,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-12-14 09:55:06,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 7 [2022-12-14 09:55:06,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 7 [2022-12-14 09:55:06,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-12-14 09:55:06,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:06,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 22 treesize of output 16 [2022-12-14 09:55:07,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:55:07,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:07,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:07,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:07,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:07,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:07,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:07,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:07,114 INFO L321 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-12-14 09:55:07,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:55:07,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:07,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:07,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:07,160 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-12-14 09:55:07,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-12-14 09:55:07,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:07,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:07,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:07,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:07,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:07,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:07,208 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 09:55:07,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-12-14 09:55:07,223 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 142 for LOIs [2022-12-14 09:55:07,835 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 70 for LOIs [2022-12-14 09:55:07,901 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:55:23,709 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7858#(and (= check_seq_next_~end.offset |check_seq_next_#in~end.offset|) (= check_seq_next_~beg.offset |check_seq_next_#in~beg.offset|) (= check_seq_next_~beg.base |check_seq_next_#in~beg.base|) (or (not (= check_seq_next_~end.offset 0)) (not (= check_seq_next_~end.base 0))) (= check_seq_next_~end.base |check_seq_next_#in~end.base|) (exists ((|v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_32| Int) (|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_35| Int)) (and (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_32|)) (<= 0 |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_32|) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_35| 0)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_35|) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_32| 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_35|) 0) |check_seq_next_#in~beg.offset|) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_35| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_32|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_35|) 0) |check_seq_next_#in~beg.base|) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_32|) (= (select |#valid| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_35|) 1) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_35| 2)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_32|) 0) |check_seq_next_#in~end.base|) (= (select |#valid| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_32|) 1) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_32|) 0) |check_seq_next_#in~end.offset|) (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_35|)) (<= 0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_35|) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_32| 2)))) (or (not (= check_seq_next_~beg.offset 0)) (not (= check_seq_next_~beg.base 0))) (= |#NULL.offset| 0) (not (= (select |#valid| check_seq_next_~beg.base) 1)) (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_42| Int)) (and (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_42|) 0) (not (= 2 |v_ULTIMATE.start_create_sll_~#list~0#1.base_42|)) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_42|) (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~#list~0#1.base_42|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_42|) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_42| 0)))) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:55:23,709 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:55:23,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:55:23,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2022-12-14 09:55:23,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408326697] [2022-12-14 09:55:23,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:55:23,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 09:55:23,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:55:23,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 09:55:23,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=4272, Unknown=25, NotChecked=0, Total=4556 [2022-12-14 09:55:23,711 INFO L87 Difference]: Start difference. First operand 186 states and 224 transitions. Second operand has 41 states, 30 states have (on average 2.2) internal successors, (66), 36 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 09:55:29,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:29,479 INFO L93 Difference]: Finished difference Result 256 states and 302 transitions. [2022-12-14 09:55:29,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 09:55:29,479 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 30 states have (on average 2.2) internal successors, (66), 36 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2022-12-14 09:55:29,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:29,480 INFO L225 Difference]: With dead ends: 256 [2022-12-14 09:55:29,480 INFO L226 Difference]: Without dead ends: 256 [2022-12-14 09:55:29,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=432, Invalid=6336, Unknown=38, NotChecked=0, Total=6806 [2022-12-14 09:55:29,482 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 248 mSDsluCounter, 1423 mSDsCounter, 0 mSdLazyCounter, 4248 mSolverCounterSat, 73 mSolverCounterUnsat, 104 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 4425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 4248 IncrementalHoareTripleChecker+Invalid, 104 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:29,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 1496 Invalid, 4425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 4248 Invalid, 104 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 09:55:29,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-12-14 09:55:29,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 186. [2022-12-14 09:55:29,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 124 states have (on average 1.532258064516129) internal successors, (190), 168 states have internal predecessors, (190), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:55:29,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 222 transitions. [2022-12-14 09:55:29,486 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 222 transitions. Word has length 38 [2022-12-14 09:55:29,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:29,487 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 222 transitions. [2022-12-14 09:55:29,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 30 states have (on average 2.2) internal successors, (66), 36 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 09:55:29,487 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 222 transitions. [2022-12-14 09:55:29,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 09:55:29,487 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:29,487 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2022-12-14 09:55:29,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 09:55:29,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:29,689 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-12-14 09:55:29,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:29,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1312970019, now seen corresponding path program 1 times [2022-12-14 09:55:29,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:55:29,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914123300] [2022-12-14 09:55:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:29,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:55:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:31,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:55:31,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914123300] [2022-12-14 09:55:31,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914123300] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:55:31,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189644971] [2022-12-14 09:55:31,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:31,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:31,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:55:31,350 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:55:31,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 09:55:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:31,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 108 conjunts are in the unsatisfiable core [2022-12-14 09:55:31,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:31,543 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 [2022-12-14 09:55:31,546 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 [2022-12-14 09:55:31,645 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:55:31,645 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 09:55:31,649 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 5 treesize of output 3 [2022-12-14 09:55:31,659 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:55:31,659 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 1 case distinctions, treesize of input 25 treesize of output 29 [2022-12-14 09:55:31,663 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 15 treesize of output 11 [2022-12-14 09:55:31,875 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 09:55:31,876 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 1 case distinctions, treesize of input 27 treesize of output 22 [2022-12-14 09:55:31,887 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 09:55:31,888 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 1 case distinctions, treesize of input 50 treesize of output 41 [2022-12-14 09:55:31,969 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:55:31,969 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 34 treesize of output 39 [2022-12-14 09:55:31,979 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:55:31,980 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 26 treesize of output 31 [2022-12-14 09:55:31,987 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:55:31,987 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 23 treesize of output 11 [2022-12-14 09:55:31,995 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:55:31,995 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 36 treesize of output 20 [2022-12-14 09:55:32,228 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_1465 Int) (v_ArrVal_1473 (Array Int Int)) (v_ArrVal_1472 (Array Int Int)) (v_ArrVal_1471 (Array Int Int)) (v_ArrVal_1470 (Array Int Int))) (and (= |c_#memory_$Pointer$.offset| (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_1470) |c_chain_node_#in~ppnode#1.base| v_ArrVal_1473)) (= |c_#length| (store |c_old(#length)| |chain_node_~node~0#1.base| v_ArrVal_1465)) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_1471) |c_chain_node_#in~ppnode#1.base| v_ArrVal_1472)) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2022-12-14 09:55:32,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:32,275 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-12-14 09:55:32,275 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 3 case distinctions, treesize of input 55 treesize of output 69 [2022-12-14 09:55:32,301 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2022-12-14 09:55:32,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 52 [2022-12-14 09:55:32,321 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:55:32,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 50 [2022-12-14 09:55:32,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:32,346 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-12-14 09:55:32,346 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 3 case distinctions, treesize of input 32 treesize of output 48 [2022-12-14 09:55:32,435 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 56 treesize of output 48 [2022-12-14 09:55:32,452 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 5 treesize of output 3 [2022-12-14 09:55:32,458 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 14 treesize of output 10 [2022-12-14 09:55:32,523 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 19 treesize of output 15 [2022-12-14 09:55:32,677 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 [2022-12-14 09:55:32,850 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 34 [2022-12-14 09:55:32,853 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 38 treesize of output 30 [2022-12-14 09:55:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-14 09:55:32,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:33,160 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:55:33,160 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 19 treesize of output 15 [2022-12-14 09:55:33,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189644971] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:55:33,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1300660458] [2022-12-14 09:55:33,504 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-12-14 09:55:33,504 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:55:33,504 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:55:33,504 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:55:33,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:55:33,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-12-14 09:55:33,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,584 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 09:55:33,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-12-14 09:55:33,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:55:33,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:55:33,606 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 15 treesize of output 1 [2022-12-14 09:55:33,608 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 [2022-12-14 09:55:33,612 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 [2022-12-14 09:55:33,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 09:55:33,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 09:55:33,631 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 19 treesize of output 1 [2022-12-14 09:55:33,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,659 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-12-14 09:55:33,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 42 [2022-12-14 09:55:33,666 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 1 [2022-12-14 09:55:33,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,688 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-12-14 09:55:33,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 42 [2022-12-14 09:55:33,703 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 1 [2022-12-14 09:55:33,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,726 INFO L321 Elim1Store]: treesize reduction 66, result has 32.0 percent of original size [2022-12-14 09:55:33,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 56 [2022-12-14 09:55:33,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,768 INFO L321 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2022-12-14 09:55:33,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 74 [2022-12-14 09:55:33,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:55:33,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:55:33,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-12-14 09:55:33,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,868 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 09:55:33,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-12-14 09:55:33,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-12-14 09:55:33,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:55:33,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:55:33,956 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 1 [2022-12-14 09:55:33,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 09:55:33,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 09:55:34,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-12-14 09:55:34,039 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 1 [2022-12-14 09:55:34,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-12-14 09:55:34,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,102 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-12-14 09:55:34,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-12-14 09:55:34,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-12-14 09:55:34,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 22 treesize of output 16 [2022-12-14 09:55:34,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 7 [2022-12-14 09:55:34,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 7 [2022-12-14 09:55:34,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,218 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-12-14 09:55:34,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-12-14 09:55:34,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-12-14 09:55:34,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 7 [2022-12-14 09:55:34,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 22 treesize of output 16 [2022-12-14 09:55:34,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 7 [2022-12-14 09:55:34,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:55:34,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,442 INFO L321 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-12-14 09:55:34,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:55:34,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,490 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-12-14 09:55:34,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-12-14 09:55:34,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:34,540 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 09:55:34,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-12-14 09:55:34,559 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 142 for LOIs [2022-12-14 09:55:35,201 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 70 for LOIs [2022-12-14 09:55:35,266 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:55:49,116 WARN L233 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 237 DAG size of output: 210 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:55:54,267 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8552#(and (= check_seq_next_~end.offset |check_seq_next_#in~end.offset|) (= check_seq_next_~beg.offset |check_seq_next_#in~beg.offset|) (= check_seq_next_~beg.base |check_seq_next_#in~beg.base|) (or (not (= check_seq_next_~end.offset 0)) (not (= check_seq_next_~end.base 0))) (= check_seq_next_~end.base |check_seq_next_#in~end.base|) (exists ((|v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_40| Int) (|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_43| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_43|) 0) |check_seq_next_#in~beg.offset|) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_43| 2)) (= (select |#valid| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_40|) 1) (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_40|)) (<= 0 |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_40|) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_40| 2)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_40|) 0) |check_seq_next_#in~end.base|) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_40|) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_43|) (= (select |#valid| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_43|) 1) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_40| 0)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_43| 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_40|) 0) |check_seq_next_#in~end.offset|) (<= 0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_43|) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_43| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_40|)) (= |check_seq_next_#in~beg.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_43|) 0)) (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_43|)))) (or (not (<= (+ check_seq_next_~beg.offset 4) (select |#length| check_seq_next_~beg.base))) (not (<= 0 check_seq_next_~beg.offset))) (or (not (= check_seq_next_~beg.offset 0)) (not (= check_seq_next_~beg.base 0))) (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_46| Int)) (and (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_46|) (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~#list~0#1.base_46|)) (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_46|) 0) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_46|) (not (= 2 |v_ULTIMATE.start_create_sll_~#list~0#1.base_46|)) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_46| 0)))) (= |#NULL.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:55:54,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:55:54,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:55:54,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 35 [2022-12-14 09:55:54,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231286940] [2022-12-14 09:55:54,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:55:54,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 09:55:54,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:55:54,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 09:55:54,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=4012, Unknown=6, NotChecked=128, Total=4422 [2022-12-14 09:55:54,269 INFO L87 Difference]: Start difference. First operand 186 states and 222 transitions. Second operand has 36 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 33 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 09:55:59,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:59,483 INFO L93 Difference]: Finished difference Result 285 states and 338 transitions. [2022-12-14 09:55:59,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 09:55:59,484 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 33 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2022-12-14 09:55:59,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:59,485 INFO L225 Difference]: With dead ends: 285 [2022-12-14 09:55:59,485 INFO L226 Difference]: Without dead ends: 285 [2022-12-14 09:55:59,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2097 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=480, Invalid=6651, Unknown=13, NotChecked=166, Total=7310 [2022-12-14 09:55:59,486 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 419 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 3914 mSolverCounterSat, 79 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 4204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3914 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:59,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 1026 Invalid, 4204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 3914 Invalid, 10 Unknown, 201 Unchecked, 3.2s Time] [2022-12-14 09:55:59,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-12-14 09:55:59,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 199. [2022-12-14 09:55:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 135 states have (on average 1.525925925925926) internal successors, (206), 180 states have internal predecessors, (206), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-14 09:55:59,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 240 transitions. [2022-12-14 09:55:59,493 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 240 transitions. Word has length 38 [2022-12-14 09:55:59,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:59,493 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 240 transitions. [2022-12-14 09:55:59,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 33 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 09:55:59,493 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 240 transitions. [2022-12-14 09:55:59,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 09:55:59,494 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:59,494 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:55:59,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 09:55:59,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:59,695 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-12-14 09:55:59,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:59,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1492147911, now seen corresponding path program 1 times [2022-12-14 09:55:59,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:55:59,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169694651] [2022-12-14 09:55:59,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:59,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:55:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:00,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:56:00,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169694651] [2022-12-14 09:56:00,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169694651] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:56:00,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59598396] [2022-12-14 09:56:00,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:56:00,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:00,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:56:00,168 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:56:00,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 09:56:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:00,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 09:56:00,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:56:00,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:00,369 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 09:56:00,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 24 [2022-12-14 09:56:00,389 INFO L321 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2022-12-14 09:56:00,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 23 [2022-12-14 09:56:00,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 9 treesize of output 7 [2022-12-14 09:56:00,444 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-12-14 09:56:00,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 10 [2022-12-14 09:56:00,463 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#length| (store |c_old(#length)| |chain_node_~node~0#1.base| (select |c_#length| |chain_node_~node~0#1.base|))) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2022-12-14 09:56:00,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:00,482 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 0 case distinctions, treesize of input 18 treesize of output 13 [2022-12-14 09:56:00,497 INFO L321 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2022-12-14 09:56:00,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 25 [2022-12-14 09:56:00,551 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 5 treesize of output 3 [2022-12-14 09:56:00,561 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (< |chain_node_alloc_node_~ptr~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1707 Int)) (= (store |c_old(#length)| |chain_node_alloc_node_~ptr~0#1.base| v_ArrVal_1707) |c_#length|)))) is different from true [2022-12-14 09:56:00,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:00,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 09:56:00,593 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 5 treesize of output 3 [2022-12-14 09:56:00,598 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (< |chain_node_alloc_node_~ptr~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1708 Int)) (= (store |c_old(#length)| |chain_node_alloc_node_~ptr~0#1.base| v_ArrVal_1708) |c_#length|)))) is different from true [2022-12-14 09:56:00,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:00,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 09:56:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 18 not checked. [2022-12-14 09:56:00,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:56:02,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59598396] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:56:02,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1415778737] [2022-12-14 09:56:02,756 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 09:56:02,756 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:56:02,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:56:02,756 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:56:02,756 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:56:02,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:02,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:02,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:02,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:02,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:02,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:02,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:02,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:02,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:02,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-12-14 09:56:02,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:02,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:02,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:02,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:02,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:02,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:02,831 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 09:56:02,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-12-14 09:56:02,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:56:02,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:56:02,846 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 [2022-12-14 09:56:02,849 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 15 treesize of output 1 [2022-12-14 09:56:02,851 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 [2022-12-14 09:56:02,857 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 19 treesize of output 1 [2022-12-14 09:56:02,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:02,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 09:56:02,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:02,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 09:56:02,877 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 1 [2022-12-14 09:56:02,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:02,901 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-12-14 09:56:02,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 42 [2022-12-14 09:56:02,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:02,929 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-12-14 09:56:02,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 42 [2022-12-14 09:56:02,943 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 1 [2022-12-14 09:56:02,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:02,986 INFO L321 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2022-12-14 09:56:02,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 74 [2022-12-14 09:56:03,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,028 INFO L321 Elim1Store]: treesize reduction 66, result has 32.0 percent of original size [2022-12-14 09:56:03,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 56 [2022-12-14 09:56:03,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:56:03,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:56:03,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-12-14 09:56:03,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,120 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 09:56:03,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-12-14 09:56:03,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-12-14 09:56:03,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:56:03,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-12-14 09:56:03,212 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 1 [2022-12-14 09:56:03,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 09:56:03,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 09:56:03,276 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 1 [2022-12-14 09:56:03,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-12-14 09:56:03,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-12-14 09:56:03,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,354 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-12-14 09:56:03,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-12-14 09:56:03,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 22 treesize of output 16 [2022-12-14 09:56:03,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 7 [2022-12-14 09:56:03,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 7 [2022-12-14 09:56:03,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-12-14 09:56:03,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,470 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-12-14 09:56:03,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-12-14 09:56:03,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 7 [2022-12-14 09:56:03,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-12-14 09:56:03,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 7 [2022-12-14 09:56:03,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 22 treesize of output 16 [2022-12-14 09:56:03,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,612 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-12-14 09:56:03,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-12-14 09:56:03,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:03,667 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-12-14 09:56:03,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-12-14 09:56:03,816 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-12-14 09:56:03,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 293 treesize of output 282 [2022-12-14 09:56:04,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:56:04,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:04,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:04,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:04,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:04,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:04,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:04,180 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 09:56:04,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-12-14 09:56:04,194 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 12 for LOIs [2022-12-14 09:56:04,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:56:04,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:56:04,212 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 [2022-12-14 09:56:04,217 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 [2022-12-14 09:56:04,221 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 15 treesize of output 1 [2022-12-14 09:56:04,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:04,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 09:56:04,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:04,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 09:56:04,249 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 19 treesize of output 1 [2022-12-14 09:56:04,264 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 1 [2022-12-14 09:56:04,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:04,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:56:04,294 INFO L321 Elim1Store]: treesize reduction 16, result has 50.0 percent of original size [2022-12-14 09:56:04,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2022-12-14 09:56:04,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:04,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:56:04,321 INFO L321 Elim1Store]: treesize reduction 16, result has 50.0 percent of original size [2022-12-14 09:56:04,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2022-12-14 09:56:04,339 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 1 [2022-12-14 09:56:04,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:04,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:56:04,356 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 09:56:04,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 38 [2022-12-14 09:56:04,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:04,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:56:04,377 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-12-14 09:56:04,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 42 [2022-12-14 09:56:04,382 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:56:08,229 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9259#(and (= |ULTIMATE.start_create_sll_#res#1.offset| |ULTIMATE.start_main_~list~1#1.offset|) (< |#StackHeapBarrier| |ULTIMATE.start_main_~#p2~0#1.base|) (= |ULTIMATE.start_create_sll_#in~pp2#1.base| |ULTIMATE.start_main_~#p2~0#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_main_~#p1~0#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_47| Int)) (and (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_47|) (= |ULTIMATE.start_create_sll_#res#1.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_47|) 0)) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_47| 0)) (= (select (store (store |ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~#p1~0#1.base| 1) |ULTIMATE.start_main_~#p2~0#1.base| 1) |v_ULTIMATE.start_create_sll_~#list~0#1.base_47|) 0) (= |ULTIMATE.start_create_sll_#res#1.offset| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~#list~0#1.base_47|) 0)) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_47|) (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~#list~0#1.base_47|)) (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_47|) 0))) (= (select |ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~#p1~0#1.base|) 0) (<= |ULTIMATE.start_create_sll_~pp1#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_main_~#p1~0#1.base| |ULTIMATE.start_create_sll_#in~pp1#1.base|) (< |#StackHeapBarrier| |ULTIMATE.start_main_~#p1~0#1.base|) (= |ULTIMATE.start_create_sll_~pp1#1.offset| |ULTIMATE.start_create_sll_#in~pp1#1.offset|) (= |ULTIMATE.start_create_sll_~pp2#1.offset| |ULTIMATE.start_create_sll_#in~pp2#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_create_sll_#in~pp1#1.offset|) (= (select (store |ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~#p1~0#1.base| 1) |ULTIMATE.start_main_~#p2~0#1.base|) 0) (= |ULTIMATE.start_create_sll_#in~pp2#1.base| |ULTIMATE.start_create_sll_~pp2#1.base|) (< (select |#length| |ULTIMATE.start_main_~#p1~0#1.base|) (+ |ULTIMATE.start_main_~#p1~0#1.offset| 4)) (= |ULTIMATE.start_create_sll_~pp1#1.base| |ULTIMATE.start_create_sll_#in~pp1#1.base|) (= |ULTIMATE.start_create_sll_#res#1.base| |ULTIMATE.start_main_~list~1#1.base|) (<= 0 |ULTIMATE.start_create_sll_~pp2#1.offset|) (= |ULTIMATE.start_main_~#p2~0#1.offset| |ULTIMATE.start_create_sll_#in~pp2#1.offset|) (< 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_create_sll_~pp2#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 09:56:08,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:56:08,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:56:08,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2022-12-14 09:56:08,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799897217] [2022-12-14 09:56:08,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:56:08,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 09:56:08,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:56:08,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 09:56:08,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1330, Unknown=4, NotChecked=228, Total=1722 [2022-12-14 09:56:08,231 INFO L87 Difference]: Start difference. First operand 199 states and 240 transitions. Second operand has 23 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 19 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 09:56:09,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:56:09,245 INFO L93 Difference]: Finished difference Result 213 states and 256 transitions. [2022-12-14 09:56:09,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 09:56:09,245 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 19 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-12-14 09:56:09,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:56:09,246 INFO L225 Difference]: With dead ends: 213 [2022-12-14 09:56:09,246 INFO L226 Difference]: Without dead ends: 213 [2022-12-14 09:56:09,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=259, Invalid=2005, Unknown=4, NotChecked=282, Total=2550 [2022-12-14 09:56:09,247 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 290 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 525 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:56:09,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 332 Invalid, 1987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1425 Invalid, 0 Unknown, 525 Unchecked, 0.7s Time] [2022-12-14 09:56:09,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-12-14 09:56:09,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 198. [2022-12-14 09:56:09,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 135 states have (on average 1.5185185185185186) internal successors, (205), 179 states have internal predecessors, (205), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-14 09:56:09,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 239 transitions. [2022-12-14 09:56:09,251 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 239 transitions. Word has length 40 [2022-12-14 09:56:09,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:56:09,252 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 239 transitions. [2022-12-14 09:56:09,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 19 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 09:56:09,252 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 239 transitions. [2022-12-14 09:56:09,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 09:56:09,252 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:56:09,252 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1] [2022-12-14 09:56:09,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 09:56:09,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:09,454 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-12-14 09:56:09,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:56:09,455 INFO L85 PathProgramCache]: Analyzing trace with hash 657155906, now seen corresponding path program 1 times [2022-12-14 09:56:09,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:56:09,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3278892] [2022-12-14 09:56:09,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:56:09,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:56:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 09:56:09,528 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 09:56:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 09:56:09,563 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 09:56:09,563 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 09:56:09,564 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location failErr0ASSERT_VIOLATIONMEMORY_LEAK (82 of 83 remaining) [2022-12-14 09:56:09,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 83 remaining) [2022-12-14 09:56:09,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 83 remaining) [2022-12-14 09:56:09,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location check_seq_nextErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 83 remaining) [2022-12-14 09:56:09,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location check_seq_nextErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 83 remaining) [2022-12-14 09:56:09,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location check_seq_prevErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 83 remaining) [2022-12-14 09:56:09,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location check_seq_prevErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 83 remaining) [2022-12-14 09:56:09,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location check_seq_prevErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 83 remaining) [2022-12-14 09:56:09,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location check_seq_prevErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 83 remaining) [2022-12-14 09:56:09,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 83 remaining) [2022-12-14 09:56:09,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 83 remaining) [2022-12-14 09:56:09,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 83 remaining) [2022-12-14 09:56:09,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location chain_nodeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 83 remaining) [2022-12-14 09:56:09,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location chain_nodeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 83 remaining) [2022-12-14 09:56:09,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location chain_nodeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 83 remaining) [2022-12-14 09:56:09,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location chain_nodeErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 83 remaining) [2022-12-14 09:56:09,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location chain_nodeErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 83 remaining) [2022-12-14 09:56:09,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location chain_nodeErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 83 remaining) [2022-12-14 09:56:09,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location chain_nodeErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 83 remaining) [2022-12-14 09:56:09,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 83 remaining) [2022-12-14 09:56:09,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 83 remaining) [2022-12-14 09:56:09,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 83 remaining) [2022-12-14 09:56:09,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 83 remaining) [2022-12-14 09:56:09,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 83 remaining) [2022-12-14 09:56:09,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 83 remaining) [2022-12-14 09:56:09,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 83 remaining) [2022-12-14 09:56:09,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 83 remaining) [2022-12-14 09:56:09,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 83 remaining) [2022-12-14 09:56:09,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 83 remaining) [2022-12-14 09:56:09,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 83 remaining) [2022-12-14 09:56:09,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 83 remaining) [2022-12-14 09:56:09,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 83 remaining) [2022-12-14 09:56:09,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 83 remaining) [2022-12-14 09:56:09,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 83 remaining) [2022-12-14 09:56:09,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 83 remaining) [2022-12-14 09:56:09,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 83 remaining) [2022-12-14 09:56:09,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 83 remaining) [2022-12-14 09:56:09,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 83 remaining) [2022-12-14 09:56:09,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 83 remaining) [2022-12-14 09:56:09,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 83 remaining) [2022-12-14 09:56:09,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 83 remaining) [2022-12-14 09:56:09,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 83 remaining) [2022-12-14 09:56:09,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 83 remaining) [2022-12-14 09:56:09,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 83 remaining) [2022-12-14 09:56:09,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 83 remaining) [2022-12-14 09:56:09,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 83 remaining) [2022-12-14 09:56:09,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 83 remaining) [2022-12-14 09:56:09,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 83 remaining) [2022-12-14 09:56:09,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 83 remaining) [2022-12-14 09:56:09,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 83 remaining) [2022-12-14 09:56:09,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 83 remaining) [2022-12-14 09:56:09,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 83 remaining) [2022-12-14 09:56:09,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 83 remaining) [2022-12-14 09:56:09,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 83 remaining) [2022-12-14 09:56:09,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 83 remaining) [2022-12-14 09:56:09,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 83 remaining) [2022-12-14 09:56:09,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 83 remaining) [2022-12-14 09:56:09,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 83 remaining) [2022-12-14 09:56:09,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 83 remaining) [2022-12-14 09:56:09,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 83 remaining) [2022-12-14 09:56:09,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 83 remaining) [2022-12-14 09:56:09,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 83 remaining) [2022-12-14 09:56:09,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 83 remaining) [2022-12-14 09:56:09,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 83 remaining) [2022-12-14 09:56:09,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr45REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 83 remaining) [2022-12-14 09:56:09,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 83 remaining) [2022-12-14 09:56:09,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 83 remaining) [2022-12-14 09:56:09,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 83 remaining) [2022-12-14 09:56:09,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 83 remaining) [2022-12-14 09:56:09,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 83 remaining) [2022-12-14 09:56:09,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 83 remaining) [2022-12-14 09:56:09,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 83 remaining) [2022-12-14 09:56:09,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 83 remaining) [2022-12-14 09:56:09,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 83 remaining) [2022-12-14 09:56:09,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr55REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 83 remaining) [2022-12-14 09:56:09,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr56REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 83 remaining) [2022-12-14 09:56:09,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 83 remaining) [2022-12-14 09:56:09,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr58REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 83 remaining) [2022-12-14 09:56:09,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 83 remaining) [2022-12-14 09:56:09,571 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE (3 of 83 remaining) [2022-12-14 09:56:09,571 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE (2 of 83 remaining) [2022-12-14 09:56:09,571 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE (1 of 83 remaining) [2022-12-14 09:56:09,571 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_LEAK (0 of 83 remaining) [2022-12-14 09:56:09,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 09:56:09,573 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:56:09,576 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 09:56:09,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 09:56:09 BoogieIcfgContainer [2022-12-14 09:56:09,597 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 09:56:09,597 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 09:56:09,597 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 09:56:09,598 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 09:56:09,598 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:53:54" (3/4) ... [2022-12-14 09:56:09,600 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 09:56:09,629 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 09:56:09,629 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 09:56:09,629 INFO L158 Benchmark]: Toolchain (without parser) took 136518.29ms. Allocated memory was 127.9MB in the beginning and 270.5MB in the end (delta: 142.6MB). Free memory was 92.8MB in the beginning and 137.3MB in the end (delta: -44.5MB). Peak memory consumption was 101.2MB. Max. memory is 16.1GB. [2022-12-14 09:56:09,629 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 127.9MB. Free memory is still 98.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 09:56:09,629 INFO L158 Benchmark]: CACSL2BoogieTranslator took 273.55ms. Allocated memory is still 127.9MB. Free memory was 92.7MB in the beginning and 74.7MB in the end (delta: 18.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-12-14 09:56:09,629 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.33ms. Allocated memory is still 127.9MB. Free memory was 74.7MB in the beginning and 72.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:56:09,630 INFO L158 Benchmark]: Boogie Preprocessor took 28.83ms. Allocated memory is still 127.9MB. Free memory was 72.3MB in the beginning and 69.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:56:09,630 INFO L158 Benchmark]: RCFGBuilder took 607.94ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 69.7MB in the beginning and 97.2MB in the end (delta: -27.5MB). Peak memory consumption was 23.5MB. Max. memory is 16.1GB. [2022-12-14 09:56:09,630 INFO L158 Benchmark]: TraceAbstraction took 135539.81ms. Allocated memory was 155.2MB in the beginning and 270.5MB in the end (delta: 115.3MB). Free memory was 96.5MB in the beginning and 140.5MB in the end (delta: -44.0MB). Peak memory consumption was 71.4MB. Max. memory is 16.1GB. [2022-12-14 09:56:09,630 INFO L158 Benchmark]: Witness Printer took 31.60ms. Allocated memory is still 270.5MB. Free memory was 140.5MB in the beginning and 137.3MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-14 09:56:09,630 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 127.9MB. Free memory is still 98.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 273.55ms. Allocated memory is still 127.9MB. Free memory was 92.7MB in the beginning and 74.7MB in the end (delta: 18.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.33ms. Allocated memory is still 127.9MB. Free memory was 74.7MB in the beginning and 72.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.83ms. Allocated memory is still 127.9MB. Free memory was 72.3MB in the beginning and 69.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 607.94ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 69.7MB in the beginning and 97.2MB in the end (delta: -27.5MB). Peak memory consumption was 23.5MB. Max. memory is 16.1GB. * TraceAbstraction took 135539.81ms. Allocated memory was 155.2MB in the beginning and 270.5MB in the end (delta: 115.3MB). Free memory was 96.5MB in the beginning and 140.5MB in the end (delta: -44.0MB). Peak memory consumption was 71.4MB. Max. memory is 16.1GB. * Witness Printer took 31.60ms. Allocated memory is still 270.5MB. Free memory was 140.5MB in the beginning and 137.3MB in the end (delta: 3.2MB). 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 - CounterExampleResult [Line: 565]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L639] const struct node *p1, *p2; [L640] CALL, EXPR create_sll(&p1, &p2) [L588] struct node *list = ((void *)0); VAL [list={7:0}, pp1={5:0}, pp1={5:0}, pp2={6:0}, pp2={6:0}] [L590] CALL chain_node(&list) [L582] CALL, EXPR alloc_node() [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) VAL [ptr={3:0}] [L576] ptr->next = ((void *)0) VAL [ptr={3:0}] [L577] ptr->prev = ((void *)0) [L578] return ptr; [L582] RET, EXPR alloc_node() [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) VAL [\read(**ppnode)={0:0}, node={3:0}, ppnode={7:0}, ppnode={7:0}] [L583] node->next = *ppnode [L584] *ppnode = node [L590] RET chain_node(&list) VAL [list={7:0}, pp1={5:0}, pp1={5:0}, pp2={6:0}, pp2={6:0}] [L591] COND FALSE !(__VERIFIER_nondet_int()) [L592] EXPR \read(*list) VAL [\read(*list)={3:0}, list={7:0}, pp1={5:0}, pp1={5:0}, pp2={6:0}, pp2={6:0}] [L592] *pp2 = list [L593] COND FALSE !(__VERIFIER_nondet_int()) [L595] EXPR \read(*list) VAL [\read(*list)={3:0}, list={7:0}, pp1={5:0}, pp1={5:0}, pp2={6:0}, pp2={6:0}] [L595] *pp1 = list [L597] CALL chain_node(&list) [L582] CALL, EXPR alloc_node() [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) VAL [ptr={-1:0}] [L576] ptr->next = ((void *)0) VAL [ptr={-1:0}] [L577] ptr->prev = ((void *)0) [L578] return ptr; [L582] RET, EXPR alloc_node() [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) VAL [\read(**ppnode)={3:0}, node={-1:0}, ppnode={7:0}, ppnode={7:0}] [L583] node->next = *ppnode [L584] *ppnode = node [L597] RET chain_node(&list) VAL [list={7:0}, pp1={5:0}, pp1={5:0}, pp2={6:0}, pp2={6:0}] [L598] COND FALSE !(__VERIFIER_nondet_int()) [L599] EXPR \read(*list) [L599] return list; [L588] struct node *list = ((void *)0); [L599] return list; [L640] RET, EXPR create_sll(&p1, &p2) [L640] struct node *list = create_sll(&p1, &p2); [L642] EXPR \read(*p1) VAL [\read(*p1)={3:0}, list={-1:0}, p1={5:0}, p2={6:0}] [L642] EXPR \read(*p2) VAL [\read(*p1)={3:0}, \read(*p2)={3:0}, list={-1:0}, p1={5:0}, p2={6:0}] [L642] CALL check_seq_next(p1, p2) VAL [beg={3:0}, end={3:0}] [L626] COND FALSE !(!(beg)) VAL [beg={3:0}, beg={3:0}, end={3:0}, end={3:0}] [L627] COND FALSE !(!(end)) VAL [beg={3:0}, beg={3:0}, end={3:0}, end={3:0}] [L628] EXPR beg->next [L628] beg = beg->next [L628] COND TRUE end != beg VAL [beg={0:0}, beg={3:0}, end={3:0}, end={3:0}] [L629] COND TRUE !(beg) VAL [beg={3:0}, beg={0:0}, end={3:0}, end={3:0}] [L629] CALL fail() [L565] reach_error() - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 658]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 658]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 658]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 637]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 194 locations, 83 error locations. Started 1 CEGAR loops. OverallTime: 135.5s, OverallIterations: 22, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 24.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 150 mSolverCounterUnknown, 3851 SdHoareTripleChecker+Valid, 15.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3807 mSDsluCounter, 10267 SdHoareTripleChecker+Invalid, 13.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2027 IncrementalHoareTripleChecker+Unchecked, 8077 mSDsCounter, 739 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 23369 IncrementalHoareTripleChecker+Invalid, 26285 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 739 mSolverCounterUnsat, 2190 mSDtfsCounter, 23369 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 844 GetRequests, 310 SyntacticMatches, 16 SemanticMatches, 518 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 8775 ImplicationChecksByTransitivity, 94.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=199occurred in iteration=20, InterpolantAutomatonStates: 199, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 408 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 24.9s InterpolantComputationTime, 725 NumberOfCodeBlocks, 725 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 655 ConstructedInterpolants, 97 QuantifiedInterpolants, 17461 SizeOfPredicates, 129 NumberOfNonLiveVariables, 2909 ConjunctsInSsa, 461 ConjunctsInUnsatCore, 28 InterpolantComputations, 15 PerfectInterpolantSequences, 44/157 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: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-14 09:56:09,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1711fd-c1bb-49dc-8a3b-441a676c5c21/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup)